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Finding the Fourth Proportional to 521,689.80, 783,117.90 and 403,883.40

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Solution

The fourth proportional to 521,689.80, 783,117.90 and 403,883.40 is: 606,276.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,689.80 : 783,117.90 = 403,883.40 : x
  2. Step 2: Convert to fraction form
    521,689.80/783,117.90 = 403,883.40/x
  3. Step 3: Cross multiply
    521,689.80x = 783,117.90 × 403,883.40
  4. Step 4: Simplify right side
    521,689.80x = 316,288,320,052.86
  5. Step 5: Solve for x
    x = 316,288,320,052.86/521,689.80
  6. Step 6: Final answer
    x = 606,276.60

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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.