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Finding the Fourth Proportional to 520,080.55, 780,704.03 and 402,274.15

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Solution

The fourth proportional to 520,080.55, 780,704.03 and 402,274.15 is: 603,862.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,080.55 : 780,704.03 = 402,274.15 : x
  2. Step 2: Convert to fraction form
    520,080.55/780,704.03 = 402,274.15/x
  3. Step 3: Cross multiply
    520,080.55x = 780,704.03 × 402,274.15
  4. Step 4: Simplify right side
    520,080.55x = 314,057,048,058.45
  5. Step 5: Solve for x
    x = 314,057,048,058.45/520,080.55
  6. Step 6: Final answer
    x = 603,862.32

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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.