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Finding the Fourth Proportional to 520,290.74, 780,343.98 and 141,240.92

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Solution

The fourth proportional to 520,290.74, 780,343.98 and 141,240.92 is: 211,836.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,290.74 : 780,343.98 = 141,240.92 : x
  2. Step 2: Convert to fraction form
    520,290.74/780,343.98 = 141,240.92/x
  3. Step 3: Cross multiply
    520,290.74x = 780,343.98 × 141,240.92
  4. Step 4: Simplify right side
    520,290.74x = 110,216,497,220.29
  5. Step 5: Solve for x
    x = 110,216,497,220.29/520,290.74
  6. Step 6: Final answer
    x = 211,836.36

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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.