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Finding the Fourth Proportional to 1,487.86, 2,052.70 and 898.18

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Solution

The fourth proportional to 1,487.86, 2,052.70 and 898.18 is: 1,239.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.86 : 2,052.70 = 898.18 : x
  2. Step 2: Convert to fraction form
    1,487.86/2,052.70 = 898.18/x
  3. Step 3: Cross multiply
    1,487.86x = 2,052.70 × 898.18
  4. Step 4: Simplify right side
    1,487.86x = 1,843,686.71
  5. Step 5: Solve for x
    x = 1,843,686.71/1,487.86
  6. Step 6: Final answer
    x = 1,239.16

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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.