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Finding the Fourth Proportional to 423,956.74, 634,550.55 and 311,607.22

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Solution

The fourth proportional to 423,956.74, 634,550.55 and 311,607.22 is: 466,393.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,956.74 : 634,550.55 = 311,607.22 : x
  2. Step 2: Convert to fraction form
    423,956.74/634,550.55 = 311,607.22/x
  3. Step 3: Cross multiply
    423,956.74x = 634,550.55 × 311,607.22
  4. Step 4: Simplify right side
    423,956.74x = 197,730,532,834.97
  5. Step 5: Solve for x
    x = 197,730,532,834.97/423,956.74
  6. Step 6: Final answer
    x = 466,393.18

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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.