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Finding the Fourth Proportional to 423,402.48, 634,962.78 and 123,900.12

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Solution

The fourth proportional to 423,402.48, 634,962.78 and 123,900.12 is: 185,808.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,402.48 : 634,962.78 = 123,900.12 : x
  2. Step 2: Convert to fraction form
    423,402.48/634,962.78 = 123,900.12/x
  3. Step 3: Cross multiply
    423,402.48x = 634,962.78 × 123,900.12
  4. Step 4: Simplify right side
    423,402.48x = 78,671,964,637.53
  5. Step 5: Solve for x
    x = 78,671,964,637.53/423,402.48
  6. Step 6: Final answer
    x = 185,808.94

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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.