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Finding the Fourth Proportional to 485,621.40, 728,432.10 and 249,425.40

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Solution

The fourth proportional to 485,621.40, 728,432.10 and 249,425.40 is: 374,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,621.40 : 728,432.10 = 249,425.40 : x
  2. Step 2: Convert to fraction form
    485,621.40/728,432.10 = 249,425.40/x
  3. Step 3: Cross multiply
    485,621.40x = 728,432.10 × 249,425.40
  4. Step 4: Simplify right side
    485,621.40x = 181,689,467,915.34
  5. Step 5: Solve for x
    x = 181,689,467,915.34/485,621.40
  6. Step 6: Final answer
    x = 374,138.10

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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.