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Finding the Fourth Proportional to 1,017.05, 1,525.20 and 358.76

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Solution

The fourth proportional to 1,017.05, 1,525.20 and 358.76 is: 538.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.05 : 1,525.20 = 358.76 : x
  2. Step 2: Convert to fraction form
    1,017.05/1,525.20 = 358.76/x
  3. Step 3: Cross multiply
    1,017.05x = 1,525.20 × 358.76
  4. Step 4: Simplify right side
    1,017.05x = 547,173.13
  5. Step 5: Solve for x
    x = 547,173.13/1,017.05
  6. Step 6: Final answer
    x = 538.00

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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.