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Finding the Fourth Proportional to 1,041.45, 1,437.39 and 621.87

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Solution

The fourth proportional to 1,041.45, 1,437.39 and 621.87 is: 858.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.45 : 1,437.39 = 621.87 : x
  2. Step 2: Convert to fraction form
    1,041.45/1,437.39 = 621.87/x
  3. Step 3: Cross multiply
    1,041.45x = 1,437.39 × 621.87
  4. Step 4: Simplify right side
    1,041.45x = 893,869.72
  5. Step 5: Solve for x
    x = 893,869.72/1,041.45
  6. Step 6: Final answer
    x = 858.29

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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.