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Finding the Fourth Proportional to 478,553,752.80, 717,830,629.20 and 409,678,999.20

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Solution

The fourth proportional to 478,553,752.80, 717,830,629.20 and 409,678,999.20 is: 614,518,498.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,553,752.80 : 717,830,629.20 = 409,678,999.20 : x
  2. Step 2: Convert to fraction form
    478,553,752.80/717,830,629.20 = 409,678,999.20/x
  3. Step 3: Cross multiply
    478,553,752.80x = 717,830,629.20 × 409,678,999.20
  4. Step 4: Simplify right side
    478,553,752.80x = 294,080,133,765,762,304
  5. Step 5: Solve for x
    x = 294,080,133,765,762,304/478,553,752.80
  6. Step 6: Final answer
    x = 614,518,498.80

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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.