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Finding the Fourth Proportional to 528,920.87, 730,119.17 and 356,940.66

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Solution

The fourth proportional to 528,920.87, 730,119.17 and 356,940.66 is: 492,718.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,920.87 : 730,119.17 = 356,940.66 : x
  2. Step 2: Convert to fraction form
    528,920.87/730,119.17 = 356,940.66/x
  3. Step 3: Cross multiply
    528,920.87x = 730,119.17 × 356,940.66
  4. Step 4: Simplify right side
    528,920.87x = 260,609,216,633.75
  5. Step 5: Solve for x
    x = 260,609,216,633.75/528,920.87
  6. Step 6: Final answer
    x = 492,718.73

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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.