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Finding the Fourth Proportional to 615,113.40, 922,815.90 and 315,640.20

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Solution

The fourth proportional to 615,113.40, 922,815.90 and 315,640.20 is: 473,535.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,113.40 : 922,815.90 = 315,640.20 : x
  2. Step 2: Convert to fraction form
    615,113.40/922,815.90 = 315,640.20/x
  3. Step 3: Cross multiply
    615,113.40x = 922,815.90 × 315,640.20
  4. Step 4: Simplify right side
    615,113.40x = 291,277,795,239.18
  5. Step 5: Solve for x
    x = 291,277,795,239.18/615,113.40
  6. Step 6: Final answer
    x = 473,535.12

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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.