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Finding the Fourth Proportional to 457,428.60, 631,271.61 and 253,478.97

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Solution

The fourth proportional to 457,428.60, 631,271.61 and 253,478.97 is: 349,812.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,428.60 : 631,271.61 = 253,478.97 : x
  2. Step 2: Convert to fraction form
    457,428.60/631,271.61 = 253,478.97/x
  3. Step 3: Cross multiply
    457,428.60x = 631,271.61 × 253,478.97
  4. Step 4: Simplify right side
    457,428.60x = 160,014,077,493.04
  5. Step 5: Solve for x
    x = 160,014,077,493.04/457,428.60
  6. Step 6: Final answer
    x = 349,812.14

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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.