Home / 1,041.12-1,436.76-621.78

Finding the Fourth Proportional to 1,041.12, 1,436.76 and 621.78

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Solution

The fourth proportional to 1,041.12, 1,436.76 and 621.78 is: 858.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.12 : 1,436.76 = 621.78 : x
  2. Step 2: Convert to fraction form
    1,041.12/1,436.76 = 621.78/x
  3. Step 3: Cross multiply
    1,041.12x = 1,436.76 × 621.78
  4. Step 4: Simplify right side
    1,041.12x = 893,348.63
  5. Step 5: Solve for x
    x = 893,348.63/1,041.12
  6. Step 6: Final answer
    x = 858.07

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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.