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Finding the Fourth Proportional to 1,078.67, 1,488.48 and 612.92

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Solution

The fourth proportional to 1,078.67, 1,488.48 and 612.92 is: 845.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.67 : 1,488.48 = 612.92 : x
  2. Step 2: Convert to fraction form
    1,078.67/1,488.48 = 612.92/x
  3. Step 3: Cross multiply
    1,078.67x = 1,488.48 × 612.92
  4. Step 4: Simplify right side
    1,078.67x = 912,319.16
  5. Step 5: Solve for x
    x = 912,319.16/1,078.67
  6. Step 6: Final answer
    x = 845.78

Related Problems

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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.