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Finding the Fourth Proportional to 615,205.40, 922,808.10 and 345,056.23

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Solution

The fourth proportional to 615,205.40, 922,808.10 and 345,056.23 is: 517,584.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,205.40 : 922,808.10 = 345,056.23 : x
  2. Step 2: Convert to fraction form
    615,205.40/922,808.10 = 345,056.23/x
  3. Step 3: Cross multiply
    615,205.40x = 922,808.10 × 345,056.23
  4. Step 4: Simplify right side
    615,205.40x = 318,420,683,999.46
  5. Step 5: Solve for x
    x = 318,420,683,999.46/615,205.40
  6. Step 6: Final answer
    x = 517,584.35

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.