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Finding the Fourth Proportional to 426,893.60, 639,649.20 and 268,839.20

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Solution

The fourth proportional to 426,893.60, 639,649.20 and 268,839.20 is: 402,823.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,893.60 : 639,649.20 = 268,839.20 : x
  2. Step 2: Convert to fraction form
    426,893.60/639,649.20 = 268,839.20/x
  3. Step 3: Cross multiply
    426,893.60x = 639,649.20 × 268,839.20
  4. Step 4: Simplify right side
    426,893.60x = 171,962,779,208.64
  5. Step 5: Solve for x
    x = 171,962,779,208.64/426,893.60
  6. Step 6: Final answer
    x = 402,823.51

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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.