Home / 286,211.80-428,972.10-145,898.20

Finding the Fourth Proportional to 286,211.80, 428,972.10 and 145,898.20

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Solution

The fourth proportional to 286,211.80, 428,972.10 and 145,898.20 is: 218,671.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,211.80 : 428,972.10 = 145,898.20 : x
  2. Step 2: Convert to fraction form
    286,211.80/428,972.10 = 145,898.20/x
  3. Step 3: Cross multiply
    286,211.80x = 428,972.10 × 145,898.20
  4. Step 4: Simplify right side
    286,211.80x = 62,586,257,240.22
  5. Step 5: Solve for x
    x = 62,586,257,240.22/286,211.80
  6. Step 6: Final answer
    x = 218,671.13

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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.