Home / 1,555.12-2,332.70-400.87

Finding the Fourth Proportional to 1,555.12, 2,332.70 and 400.87

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Solution

The fourth proportional to 1,555.12, 2,332.70 and 400.87 is: 601.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.12 : 2,332.70 = 400.87 : x
  2. Step 2: Convert to fraction form
    1,555.12/2,332.70 = 400.87/x
  3. Step 3: Cross multiply
    1,555.12x = 2,332.70 × 400.87
  4. Step 4: Simplify right side
    1,555.12x = 935,095.78
  5. Step 5: Solve for x
    x = 935,095.78/1,555.12
  6. Step 6: Final answer
    x = 601.30

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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.