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Finding the Fourth Proportional to 5,251.76, 7,875.81 and 1,553

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Solution

The fourth proportional to 5,251.76, 7,875.81 and 1,553 is: 2,328.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,251.76 : 7,875.81 = 1,553 : x
  2. Step 2: Convert to fraction form
    5,251.76/7,875.81 = 1,553/x
  3. Step 3: Cross multiply
    5,251.76x = 7,875.81 × 1,553
  4. Step 4: Simplify right side
    5,251.76x = 12,231,132.93
  5. Step 5: Solve for x
    x = 12,231,132.93/5,251.76
  6. Step 6: Final answer
    x = 2,328.96

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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.