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Finding the Fourth Proportional to 520,087.30, 780,174.15 and 165,091.30

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Solution

The fourth proportional to 520,087.30, 780,174.15 and 165,091.30 is: 247,650.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,087.30 : 780,174.15 = 165,091.30 : x
  2. Step 2: Convert to fraction form
    520,087.30/780,174.15 = 165,091.30/x
  3. Step 3: Cross multiply
    520,087.30x = 780,174.15 × 165,091.30
  4. Step 4: Simplify right side
    520,087.30x = 128,799,964,649.90
  5. Step 5: Solve for x
    x = 128,799,964,649.90/520,087.30
  6. Step 6: Final answer
    x = 247,650.66

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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.