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Finding the Fourth Proportional to 615,065.40, 922,598.10 and 447,103.80

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Solution

The fourth proportional to 615,065.40, 922,598.10 and 447,103.80 is: 670,655.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,065.40 : 922,598.10 = 447,103.80 : x
  2. Step 2: Convert to fraction form
    615,065.40/922,598.10 = 447,103.80/x
  3. Step 3: Cross multiply
    615,065.40x = 922,598.10 × 447,103.80
  4. Step 4: Simplify right side
    615,065.40x = 412,497,116,382.78
  5. Step 5: Solve for x
    x = 412,497,116,382.78/615,065.40
  6. Step 6: Final answer
    x = 670,655.70

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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.