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Finding the Fourth Proportional to 576.78, 865.44 and 288.18

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Solution

The fourth proportional to 576.78, 865.44 and 288.18 is: 432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.78 : 865.44 = 288.18 : x
  2. Step 2: Convert to fraction form
    576.78/865.44 = 288.18/x
  3. Step 3: Cross multiply
    576.78x = 865.44 × 288.18
  4. Step 4: Simplify right side
    576.78x = 249,402.50
  5. Step 5: Solve for x
    x = 249,402.50/576.78
  6. Step 6: Final answer
    x = 432.40

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.