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Finding the Fourth Proportional to 426,873.30, 639,872.55 and 249,288.90

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Solution

The fourth proportional to 426,873.30, 639,872.55 and 249,288.90 is: 373,677.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,873.30 : 639,872.55 = 249,288.90 : x
  2. Step 2: Convert to fraction form
    426,873.30/639,872.55 = 249,288.90/x
  3. Step 3: Cross multiply
    426,873.30x = 639,872.55 × 249,288.90
  4. Step 4: Simplify right side
    426,873.30x = 159,513,124,129.70
  5. Step 5: Solve for x
    x = 159,513,124,129.70/426,873.30
  6. Step 6: Final answer
    x = 373,677.91

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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.