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Finding the Fourth Proportional to 352,430.73, 528,646.10 and 86,188.08

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Solution

The fourth proportional to 352,430.73, 528,646.10 and 86,188.08 is: 129,282.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,430.73 : 528,646.10 = 86,188.08 : x
  2. Step 2: Convert to fraction form
    352,430.73/528,646.10 = 86,188.08/x
  3. Step 3: Cross multiply
    352,430.73x = 528,646.10 × 86,188.08
  4. Step 4: Simplify right side
    352,430.73x = 45,562,993,909.97
  5. Step 5: Solve for x
    x = 45,562,993,909.97/352,430.73
  6. Step 6: Final answer
    x = 129,282.13

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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.