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Finding the Fourth Proportional to 702.71, 970.06 and 407.92

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Solution

The fourth proportional to 702.71, 970.06 and 407.92 is: 563.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.71 : 970.06 = 407.92 : x
  2. Step 2: Convert to fraction form
    702.71/970.06 = 407.92/x
  3. Step 3: Cross multiply
    702.71x = 970.06 × 407.92
  4. Step 4: Simplify right side
    702.71x = 395,706.88
  5. Step 5: Solve for x
    x = 395,706.88/702.71
  6. Step 6: Final answer
    x = 563.12

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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.