Home / 520,621.36-781,052.34-221,111.74

Finding the Fourth Proportional to 520,621.36, 781,052.34 and 221,111.74

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Solution

The fourth proportional to 520,621.36, 781,052.34 and 221,111.74 is: 331,718.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,621.36 : 781,052.34 = 221,111.74 : x
  2. Step 2: Convert to fraction form
    520,621.36/781,052.34 = 221,111.74/x
  3. Step 3: Cross multiply
    520,621.36x = 781,052.34 × 221,111.74
  4. Step 4: Simplify right side
    520,621.36x = 172,699,841,928.47
  5. Step 5: Solve for x
    x = 172,699,841,928.47/520,621.36
  6. Step 6: Final answer
    x = 331,718.70

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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.