Home / 715,822.29-987,776.01-421,425.18

Finding the Fourth Proportional to 715,822.29, 987,776.01 and 421,425.18

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Solution

The fourth proportional to 715,822.29, 987,776.01 and 421,425.18 is: 581,532.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,822.29 : 987,776.01 = 421,425.18 : x
  2. Step 2: Convert to fraction form
    715,822.29/987,776.01 = 421,425.18/x
  3. Step 3: Cross multiply
    715,822.29x = 987,776.01 × 421,425.18
  4. Step 4: Simplify right side
    715,822.29x = 416,273,682,813.93
  5. Step 5: Solve for x
    x = 416,273,682,813.93/715,822.29
  6. Step 6: Final answer
    x = 581,532.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.