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Finding the Fourth Proportional to 615,909.20, 849,978.90 and 354,264.02

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Solution

The fourth proportional to 615,909.20, 849,978.90 and 354,264.02 is: 488,898.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,909.20 : 849,978.90 = 354,264.02 : x
  2. Step 2: Convert to fraction form
    615,909.20/849,978.90 = 354,264.02/x
  3. Step 3: Cross multiply
    615,909.20x = 849,978.90 × 354,264.02
  4. Step 4: Simplify right side
    615,909.20x = 301,116,942,029.18
  5. Step 5: Solve for x
    x = 301,116,942,029.18/615,909.20
  6. Step 6: Final answer
    x = 488,898.27

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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.