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Finding the Fourth Proportional to 663,611.40, 995,417.10 and 220,379.40

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Solution

The fourth proportional to 663,611.40, 995,417.10 and 220,379.40 is: 330,569.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,611.40 : 995,417.10 = 220,379.40 : x
  2. Step 2: Convert to fraction form
    663,611.40/995,417.10 = 220,379.40/x
  3. Step 3: Cross multiply
    663,611.40x = 995,417.10 × 220,379.40
  4. Step 4: Simplify right side
    663,611.40x = 219,369,423,247.74
  5. Step 5: Solve for x
    x = 219,369,423,247.74/663,611.40
  6. Step 6: Final answer
    x = 330,569.10

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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.