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Finding the Fourth Proportional to 520,088.20, 780,132.30 and 295,361.80

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Solution

The fourth proportional to 520,088.20, 780,132.30 and 295,361.80 is: 443,042.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,088.20 : 780,132.30 = 295,361.80 : x
  2. Step 2: Convert to fraction form
    520,088.20/780,132.30 = 295,361.80/x
  3. Step 3: Cross multiply
    520,088.20x = 780,132.30 × 295,361.80
  4. Step 4: Simplify right side
    520,088.20x = 230,421,280,366.14
  5. Step 5: Solve for x
    x = 230,421,280,366.14/520,088.20
  6. Step 6: Final answer
    x = 443,042.70

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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.