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Finding the Fourth Proportional to 6,385.70, 9,578.55 and 4,417.40

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Solution

The fourth proportional to 6,385.70, 9,578.55 and 4,417.40 is: 6,626.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,385.70 : 9,578.55 = 4,417.40 : x
  2. Step 2: Convert to fraction form
    6,385.70/9,578.55 = 4,417.40/x
  3. Step 3: Cross multiply
    6,385.70x = 9,578.55 × 4,417.40
  4. Step 4: Simplify right side
    6,385.70x = 42,312,286.77
  5. Step 5: Solve for x
    x = 42,312,286.77/6,385.70
  6. Step 6: Final answer
    x = 6,626.10

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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.