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Finding the Fourth Proportional to 590,988.80, 885,235.20 and 391,404.80

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Solution

The fourth proportional to 590,988.80, 885,235.20 and 391,404.80 is: 586,280.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    590,988.80 : 885,235.20 = 391,404.80 : x
  2. Step 2: Convert to fraction form
    590,988.80/885,235.20 = 391,404.80/x
  3. Step 3: Cross multiply
    590,988.80x = 885,235.20 × 391,404.80
  4. Step 4: Simplify right side
    590,988.80x = 346,485,306,408.96
  5. Step 5: Solve for x
    x = 346,485,306,408.96/590,988.80
  6. Step 6: Final answer
    x = 586,280.66

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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.