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Finding the Fourth Proportional to 1,031.63, 1,547.26 and 415.17

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Solution

The fourth proportional to 1,031.63, 1,547.26 and 415.17 is: 622.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.63 : 1,547.26 = 415.17 : x
  2. Step 2: Convert to fraction form
    1,031.63/1,547.26 = 415.17/x
  3. Step 3: Cross multiply
    1,031.63x = 1,547.26 × 415.17
  4. Step 4: Simplify right side
    1,031.63x = 642,374.90
  5. Step 5: Solve for x
    x = 642,374.90/1,031.63
  6. Step 6: Final answer
    x = 622.68

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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.