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Finding the Fourth Proportional to 1,042.47, 1,437.95 and 644.03

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Solution

The fourth proportional to 1,042.47, 1,437.95 and 644.03 is: 888.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.47 : 1,437.95 = 644.03 : x
  2. Step 2: Convert to fraction form
    1,042.47/1,437.95 = 644.03/x
  3. Step 3: Cross multiply
    1,042.47x = 1,437.95 × 644.03
  4. Step 4: Simplify right side
    1,042.47x = 926,078.71
  5. Step 5: Solve for x
    x = 926,078.71/1,042.47
  6. Step 6: Final answer
    x = 888.35

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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.