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Finding the Fourth Proportional to 590,868.80, 885,266.40 and 485,115.20

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Solution

The fourth proportional to 590,868.80, 885,266.40 and 485,115.20 is: 726,821.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    590,868.80 : 885,266.40 = 485,115.20 : x
  2. Step 2: Convert to fraction form
    590,868.80/885,266.40 = 485,115.20/x
  3. Step 3: Cross multiply
    590,868.80x = 885,266.40 × 485,115.20
  4. Step 4: Simplify right side
    590,868.80x = 429,456,186,689.28
  5. Step 5: Solve for x
    x = 429,456,186,689.28/590,868.80
  6. Step 6: Final answer
    x = 726,821.57

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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.