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Finding the Fourth Proportional to 528,665.57, 729,559.21 and 286,948.18

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Solution

The fourth proportional to 528,665.57, 729,559.21 and 286,948.18 is: 395,988.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,665.57 : 729,559.21 = 286,948.18 : x
  2. Step 2: Convert to fraction form
    528,665.57/729,559.21 = 286,948.18/x
  3. Step 3: Cross multiply
    528,665.57x = 729,559.21 × 286,948.18
  4. Step 4: Simplify right side
    528,665.57x = 209,345,687,511.74
  5. Step 5: Solve for x
    x = 209,345,687,511.74/528,665.57
  6. Step 6: Final answer
    x = 395,988.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.