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Finding the Fourth Proportional to 1,062.18, 1,465.76 and 620.12

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Solution

The fourth proportional to 1,062.18, 1,465.76 and 620.12 is: 855.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.18 : 1,465.76 = 620.12 : x
  2. Step 2: Convert to fraction form
    1,062.18/1,465.76 = 620.12/x
  3. Step 3: Cross multiply
    1,062.18x = 1,465.76 × 620.12
  4. Step 4: Simplify right side
    1,062.18x = 908,952.31
  5. Step 5: Solve for x
    x = 908,952.31/1,062.18
  6. Step 6: Final answer
    x = 855.74

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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.