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Finding the Fourth Proportional to 615,633.60, 922,759.20 and 315,998.40

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Solution

The fourth proportional to 615,633.60, 922,759.20 and 315,998.40 is: 473,642.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,633.60 : 922,759.20 = 315,998.40 : x
  2. Step 2: Convert to fraction form
    615,633.60/922,759.20 = 315,998.40/x
  3. Step 3: Cross multiply
    615,633.60x = 922,759.20 × 315,998.40
  4. Step 4: Simplify right side
    615,633.60x = 291,590,430,785.28
  5. Step 5: Solve for x
    x = 291,590,430,785.28/615,633.60
  6. Step 6: Final answer
    x = 473,642.81

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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.