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Finding the Fourth Proportional to 480,046.80, 720,070.20 and 389,845.20

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Solution

The fourth proportional to 480,046.80, 720,070.20 and 389,845.20 is: 584,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,046.80 : 720,070.20 = 389,845.20 : x
  2. Step 2: Convert to fraction form
    480,046.80/720,070.20 = 389,845.20/x
  3. Step 3: Cross multiply
    480,046.80x = 720,070.20 × 389,845.20
  4. Step 4: Simplify right side
    480,046.80x = 280,715,911,133.04
  5. Step 5: Solve for x
    x = 280,715,911,133.04/480,046.80
  6. Step 6: Final answer
    x = 584,767.80

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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.