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Finding the Fourth Proportional to 261,361,291.60, 392,041,937.40 and 220,546,622.80

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Solution

The fourth proportional to 261,361,291.60, 392,041,937.40 and 220,546,622.80 is: 330,819,934.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,361,291.60 : 392,041,937.40 = 220,546,622.80 : x
  2. Step 2: Convert to fraction form
    261,361,291.60/392,041,937.40 = 220,546,622.80/x
  3. Step 3: Cross multiply
    261,361,291.60x = 392,041,937.40 × 220,546,622.80
  4. Step 4: Simplify right side
    261,361,291.60x = 86,463,525,289,539,008
  5. Step 5: Solve for x
    x = 86,463,525,289,539,008/261,361,291.60
  6. Step 6: Final answer
    x = 330,819,934.20

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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.