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Finding the Fourth Proportional to 528,990.35, 730,230.17 and 357,141.11

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Solution

The fourth proportional to 528,990.35, 730,230.17 and 357,141.11 is: 493,005.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,990.35 : 730,230.17 = 357,141.11 : x
  2. Step 2: Convert to fraction form
    528,990.35/730,230.17 = 357,141.11/x
  3. Step 3: Cross multiply
    528,990.35x = 730,230.17 × 357,141.11
  4. Step 4: Simplify right side
    528,990.35x = 260,795,208,032.43
  5. Step 5: Solve for x
    x = 260,795,208,032.43/528,990.35
  6. Step 6: Final answer
    x = 493,005.61

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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.