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Finding the Fourth Proportional to 859,763.72, 1,186,379.72 and 497,132.70

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Solution

The fourth proportional to 859,763.72, 1,186,379.72 and 497,132.70 is: 685,988.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,763.72 : 1,186,379.72 = 497,132.70 : x
  2. Step 2: Convert to fraction form
    859,763.72/1,186,379.72 = 497,132.70/x
  3. Step 3: Cross multiply
    859,763.72x = 1,186,379.72 × 497,132.70
  4. Step 4: Simplify right side
    859,763.72x = 589,788,153,428.84
  5. Step 5: Solve for x
    x = 589,788,153,428.84/859,763.72
  6. Step 6: Final answer
    x = 685,988.65

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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.