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Finding the Fourth Proportional to 702.28, 1,053.50 and 317.64

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Solution

The fourth proportional to 702.28, 1,053.50 and 317.64 is: 476.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.28 : 1,053.50 = 317.64 : x
  2. Step 2: Convert to fraction form
    702.28/1,053.50 = 317.64/x
  3. Step 3: Cross multiply
    702.28x = 1,053.50 × 317.64
  4. Step 4: Simplify right side
    702.28x = 334,633.74
  5. Step 5: Solve for x
    x = 334,633.74/702.28
  6. Step 6: Final answer
    x = 476.50

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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.