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Finding the Fourth Proportional to 265,720.20, 399,041.10 and 187,384.20

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Solution

The fourth proportional to 265,720.20, 399,041.10 and 187,384.20 is: 281,401.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,720.20 : 399,041.10 = 187,384.20 : x
  2. Step 2: Convert to fraction form
    265,720.20/399,041.10 = 187,384.20/x
  3. Step 3: Cross multiply
    265,720.20x = 399,041.10 × 187,384.20
  4. Step 4: Simplify right side
    265,720.20x = 74,773,997,290.62
  5. Step 5: Solve for x
    x = 74,773,997,290.62/265,720.20
  6. Step 6: Final answer
    x = 281,401.25

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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.