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Finding the Fourth Proportional to 866,000.40, 1,299,000.60 and 492,752.40

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Solution

The fourth proportional to 866,000.40, 1,299,000.60 and 492,752.40 is: 739,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,000.40 : 1,299,000.60 = 492,752.40 : x
  2. Step 2: Convert to fraction form
    866,000.40/1,299,000.60 = 492,752.40/x
  3. Step 3: Cross multiply
    866,000.40x = 1,299,000.60 × 492,752.40
  4. Step 4: Simplify right side
    866,000.40x = 640,085,663,251.44
  5. Step 5: Solve for x
    x = 640,085,663,251.44/866,000.40
  6. Step 6: Final answer
    x = 739,128.60

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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.