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Finding the Fourth Proportional to 1,087.76, 1,501.10 and 590.40

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Solution

The fourth proportional to 1,087.76, 1,501.10 and 590.40 is: 814.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.76 : 1,501.10 = 590.40 : x
  2. Step 2: Convert to fraction form
    1,087.76/1,501.10 = 590.40/x
  3. Step 3: Cross multiply
    1,087.76x = 1,501.10 × 590.40
  4. Step 4: Simplify right side
    1,087.76x = 886,248.70
  5. Step 5: Solve for x
    x = 886,248.70/1,087.76
  6. Step 6: Final answer
    x = 814.74

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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.