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Finding the Fourth Proportional to 1,397.60, 2,097.84 and 1,047.50

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Solution

The fourth proportional to 1,397.60, 2,097.84 and 1,047.50 is: 1,572.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.60 : 2,097.84 = 1,047.50 : x
  2. Step 2: Convert to fraction form
    1,397.60/2,097.84 = 1,047.50/x
  3. Step 3: Cross multiply
    1,397.60x = 2,097.84 × 1,047.50
  4. Step 4: Simplify right side
    1,397.60x = 2,197,487.40
  5. Step 5: Solve for x
    x = 2,197,487.40/1,397.60
  6. Step 6: Final answer
    x = 1,572.33

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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.