Home / 520,700.18-780,897.16-221,178.38

Finding the Fourth Proportional to 520,700.18, 780,897.16 and 221,178.38

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Solution

The fourth proportional to 520,700.18, 780,897.16 and 221,178.38 is: 331,702.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,700.18 : 780,897.16 = 221,178.38 : x
  2. Step 2: Convert to fraction form
    520,700.18/780,897.16 = 221,178.38/x
  3. Step 3: Cross multiply
    520,700.18x = 780,897.16 × 221,178.38
  4. Step 4: Simplify right side
    520,700.18x = 172,717,568,795.40
  5. Step 5: Solve for x
    x = 172,717,568,795.40/520,700.18
  6. Step 6: Final answer
    x = 331,702.53

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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.