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Finding the Fourth Proportional to 615,634.60, 922,760.70 and 315,999.40

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Solution

The fourth proportional to 615,634.60, 922,760.70 and 315,999.40 is: 473,644.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,634.60 : 922,760.70 = 315,999.40 : x
  2. Step 2: Convert to fraction form
    615,634.60/922,760.70 = 315,999.40/x
  3. Step 3: Cross multiply
    615,634.60x = 922,760.70 × 315,999.40
  4. Step 4: Simplify right side
    615,634.60x = 291,591,827,543.58
  5. Step 5: Solve for x
    x = 291,591,827,543.58/615,634.60
  6. Step 6: Final answer
    x = 473,644.31

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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.