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Finding the Fourth Proportional to 1,087.40, 1,500.63 and 590.05

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Solution

The fourth proportional to 1,087.40, 1,500.63 and 590.05 is: 814.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.40 : 1,500.63 = 590.05 : x
  2. Step 2: Convert to fraction form
    1,087.40/1,500.63 = 590.05/x
  3. Step 3: Cross multiply
    1,087.40x = 1,500.63 × 590.05
  4. Step 4: Simplify right side
    1,087.40x = 885,437.95
  5. Step 5: Solve for x
    x = 885,437.95/1,087.40
  6. Step 6: Final answer
    x = 814.27

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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.