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Finding the Fourth Proportional to 702.36, 1,050.87 and 615.05

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Solution

The fourth proportional to 702.36, 1,050.87 and 615.05 is: 920.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.36 : 1,050.87 = 615.05 : x
  2. Step 2: Convert to fraction form
    702.36/1,050.87 = 615.05/x
  3. Step 3: Cross multiply
    702.36x = 1,050.87 × 615.05
  4. Step 4: Simplify right side
    702.36x = 646,332.34
  5. Step 5: Solve for x
    x = 646,332.34/702.36
  6. Step 6: Final answer
    x = 920.23

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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.