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Finding the Fourth Proportional to 521,668.80, 783,086.40 and 403,862.40

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Solution

The fourth proportional to 521,668.80, 783,086.40 and 403,862.40 is: 606,245.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,668.80 : 783,086.40 = 403,862.40 : x
  2. Step 2: Convert to fraction form
    521,668.80/783,086.40 = 403,862.40/x
  3. Step 3: Cross multiply
    521,668.80x = 783,086.40 × 403,862.40
  4. Step 4: Simplify right side
    521,668.80x = 316,259,152,911.36
  5. Step 5: Solve for x
    x = 316,259,152,911.36/521,668.80
  6. Step 6: Final answer
    x = 606,245.10

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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.