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Finding the Fourth Proportional to 478,046.80, 717,070.20 and 265,470.40

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Solution

The fourth proportional to 478,046.80, 717,070.20 and 265,470.40 is: 398,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,046.80 : 717,070.20 = 265,470.40 : x
  2. Step 2: Convert to fraction form
    478,046.80/717,070.20 = 265,470.40/x
  3. Step 3: Cross multiply
    478,046.80x = 717,070.20 × 265,470.40
  4. Step 4: Simplify right side
    478,046.80x = 190,360,912,822.08
  5. Step 5: Solve for x
    x = 190,360,912,822.08/478,046.80
  6. Step 6: Final answer
    x = 398,205.60

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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.