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Finding the Fourth Proportional to 521,704.30, 783,139.65 and 403,897.90

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Solution

The fourth proportional to 521,704.30, 783,139.65 and 403,897.90 is: 606,298.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,704.30 : 783,139.65 = 403,897.90 : x
  2. Step 2: Convert to fraction form
    521,704.30/783,139.65 = 403,897.90/x
  3. Step 3: Cross multiply
    521,704.30x = 783,139.65 × 403,897.90
  4. Step 4: Simplify right side
    521,704.30x = 316,308,460,041.74
  5. Step 5: Solve for x
    x = 316,308,460,041.74/521,704.30
  6. Step 6: Final answer
    x = 606,298.36

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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.