Home / 487,043.70-671,685.12-305,772.53

Finding the Fourth Proportional to 487,043.70, 671,685.12 and 305,772.53

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Solution

The fourth proportional to 487,043.70, 671,685.12 and 305,772.53 is: 421,692.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,043.70 : 671,685.12 = 305,772.53 : x
  2. Step 2: Convert to fraction form
    487,043.70/671,685.12 = 305,772.53/x
  3. Step 3: Cross multiply
    487,043.70x = 671,685.12 × 305,772.53
  4. Step 4: Simplify right side
    487,043.70x = 205,382,855,147.33
  5. Step 5: Solve for x
    x = 205,382,855,147.33/487,043.70
  6. Step 6: Final answer
    x = 421,692.87

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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.