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Finding the Fourth Proportional to 528,729.60, 790,790.40 and 472,972.80

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Solution

The fourth proportional to 528,729.60, 790,790.40 and 472,972.80 is: 707,398.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,729.60 : 790,790.40 = 472,972.80 : x
  2. Step 2: Convert to fraction form
    528,729.60/790,790.40 = 472,972.80/x
  3. Step 3: Cross multiply
    528,729.60x = 790,790.40 × 472,972.80
  4. Step 4: Simplify right side
    528,729.60x = 374,022,349,701.12
  5. Step 5: Solve for x
    x = 374,022,349,701.12/528,729.60
  6. Step 6: Final answer
    x = 707,398.17

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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.