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Finding the Fourth Proportional to 840.98, 1,259.04 and 702.47

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Solution

The fourth proportional to 840.98, 1,259.04 and 702.47 is: 1,051.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.98 : 1,259.04 = 702.47 : x
  2. Step 2: Convert to fraction form
    840.98/1,259.04 = 702.47/x
  3. Step 3: Cross multiply
    840.98x = 1,259.04 × 702.47
  4. Step 4: Simplify right side
    840.98x = 884,443.61
  5. Step 5: Solve for x
    x = 884,443.61/840.98
  6. Step 6: Final answer
    x = 1,051.68

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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.