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Finding the Fourth Proportional to 1,059.18, 1,461.14 and 686.24

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Solution

The fourth proportional to 1,059.18, 1,461.14 and 686.24 is: 946.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.18 : 1,461.14 = 686.24 : x
  2. Step 2: Convert to fraction form
    1,059.18/1,461.14 = 686.24/x
  3. Step 3: Cross multiply
    1,059.18x = 1,461.14 × 686.24
  4. Step 4: Simplify right side
    1,059.18x = 1,002,692.71
  5. Step 5: Solve for x
    x = 1,002,692.71/1,059.18
  6. Step 6: Final answer
    x = 946.67

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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.