Home / 656,640.10-984,960.15-257,148.10

Finding the Fourth Proportional to 656,640.10, 984,960.15 and 257,148.10

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Solution

The fourth proportional to 656,640.10, 984,960.15 and 257,148.10 is: 385,722.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,640.10 : 984,960.15 = 257,148.10 : x
  2. Step 2: Convert to fraction form
    656,640.10/984,960.15 = 257,148.10/x
  3. Step 3: Cross multiply
    656,640.10x = 984,960.15 × 257,148.10
  4. Step 4: Simplify right side
    656,640.10x = 253,280,631,148.22
  5. Step 5: Solve for x
    x = 253,280,631,148.22/656,640.10
  6. Step 6: Final answer
    x = 385,722.15

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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.