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Finding the Fourth Proportional to 1,025.39, 1,415.23 and 627.23

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Solution

The fourth proportional to 1,025.39, 1,415.23 and 627.23 is: 865.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.39 : 1,415.23 = 627.23 : x
  2. Step 2: Convert to fraction form
    1,025.39/1,415.23 = 627.23/x
  3. Step 3: Cross multiply
    1,025.39x = 1,415.23 × 627.23
  4. Step 4: Simplify right side
    1,025.39x = 887,674.71
  5. Step 5: Solve for x
    x = 887,674.71/1,025.39
  6. Step 6: Final answer
    x = 865.69

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Half scale
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Double scale
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1.5x scale

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.