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Finding the Fourth Proportional to 423,397.48, 634,971.66 and 123,806.84

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Solution

The fourth proportional to 423,397.48, 634,971.66 and 123,806.84 is: 185,673.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,397.48 : 634,971.66 = 123,806.84 : x
  2. Step 2: Convert to fraction form
    423,397.48/634,971.66 = 123,806.84/x
  3. Step 3: Cross multiply
    423,397.48x = 634,971.66 × 123,806.84
  4. Step 4: Simplify right side
    423,397.48x = 78,613,834,646.74
  5. Step 5: Solve for x
    x = 78,613,834,646.74/423,397.48
  6. Step 6: Final answer
    x = 185,673.84

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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.