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Finding the Fourth Proportional to 991,001.71, 1,486,724 and 317,123.45

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Solution

The fourth proportional to 991,001.71, 1,486,724 and 317,123.45 is: 475,756.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,001.71 : 1,486,724 = 317,123.45 : x
  2. Step 2: Convert to fraction form
    991,001.71/1,486,724 = 317,123.45/x
  3. Step 3: Cross multiply
    991,001.71x = 1,486,724 × 317,123.45
  4. Step 4: Simplify right side
    991,001.71x = 471,475,044,077.80
  5. Step 5: Solve for x
    x = 471,475,044,077.80/991,001.71
  6. Step 6: Final answer
    x = 475,756.03

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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.