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Finding the Fourth Proportional to 518,897.60, 777,763.20 and 266,080.40

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Solution

The fourth proportional to 518,897.60, 777,763.20 and 266,080.40 is: 398,821.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,897.60 : 777,763.20 = 266,080.40 : x
  2. Step 2: Convert to fraction form
    518,897.60/777,763.20 = 266,080.40/x
  3. Step 3: Cross multiply
    518,897.60x = 777,763.20 × 266,080.40
  4. Step 4: Simplify right side
    518,897.60x = 206,947,543,361.28
  5. Step 5: Solve for x
    x = 206,947,543,361.28/518,897.60
  6. Step 6: Final answer
    x = 398,821.55

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1.5x scale

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.