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Finding the Fourth Proportional to 528,565.74, 792,841.70 and 129,210

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Solution

The fourth proportional to 528,565.74, 792,841.70 and 129,210 is: 193,813.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,565.74 : 792,841.70 = 129,210 : x
  2. Step 2: Convert to fraction form
    528,565.74/792,841.70 = 129,210/x
  3. Step 3: Cross multiply
    528,565.74x = 792,841.70 × 129,210
  4. Step 4: Simplify right side
    528,565.74x = 102,443,076,057
  5. Step 5: Solve for x
    x = 102,443,076,057/528,565.74
  6. Step 6: Final answer
    x = 193,813.31

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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.