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Finding the Fourth Proportional to 591,011.80, 885,269.70 and 391,427.80

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Solution

The fourth proportional to 591,011.80, 885,269.70 and 391,427.80 is: 586,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,011.80 : 885,269.70 = 391,427.80 : x
  2. Step 2: Convert to fraction form
    591,011.80/885,269.70 = 391,427.80/x
  3. Step 3: Cross multiply
    591,011.80x = 885,269.70 × 391,427.80
  4. Step 4: Simplify right side
    591,011.80x = 346,519,171,077.66
  5. Step 5: Solve for x
    x = 346,519,171,077.66/591,011.80
  6. Step 6: Final answer
    x = 586,315.15

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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.