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Finding the Fourth Proportional to 1,458.84, 2,188.08 and 432.84

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Solution

The fourth proportional to 1,458.84, 2,188.08 and 432.84 is: 649.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.84 : 2,188.08 = 432.84 : x
  2. Step 2: Convert to fraction form
    1,458.84/2,188.08 = 432.84/x
  3. Step 3: Cross multiply
    1,458.84x = 2,188.08 × 432.84
  4. Step 4: Simplify right side
    1,458.84x = 947,088.55
  5. Step 5: Solve for x
    x = 947,088.55/1,458.84
  6. Step 6: Final answer
    x = 649.21

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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.