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Finding the Fourth Proportional to 1,688.55, 2,532.71 and 456.03

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Solution

The fourth proportional to 1,688.55, 2,532.71 and 456.03 is: 684.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.55 : 2,532.71 = 456.03 : x
  2. Step 2: Convert to fraction form
    1,688.55/2,532.71 = 456.03/x
  3. Step 3: Cross multiply
    1,688.55x = 2,532.71 × 456.03
  4. Step 4: Simplify right side
    1,688.55x = 1,154,989.46
  5. Step 5: Solve for x
    x = 1,154,989.46/1,688.55
  6. Step 6: Final answer
    x = 684.01

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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.