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Finding the Fourth Proportional to 1,087.99, 1,501.40 and 615.87

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Solution

The fourth proportional to 1,087.99, 1,501.40 and 615.87 is: 849.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.99 : 1,501.40 = 615.87 : x
  2. Step 2: Convert to fraction form
    1,087.99/1,501.40 = 615.87/x
  3. Step 3: Cross multiply
    1,087.99x = 1,501.40 × 615.87
  4. Step 4: Simplify right side
    1,087.99x = 924,672.08
  5. Step 5: Solve for x
    x = 924,672.08/1,087.99
  6. Step 6: Final answer
    x = 849.89

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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.