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Finding the Fourth Proportional to 867,395.64, 1,196,778.42 and 499,782.72

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Solution

The fourth proportional to 867,395.64, 1,196,778.42 and 499,782.72 is: 689,569.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,395.64 : 1,196,778.42 = 499,782.72 : x
  2. Step 2: Convert to fraction form
    867,395.64/1,196,778.42 = 499,782.72/x
  3. Step 3: Cross multiply
    867,395.64x = 1,196,778.42 × 499,782.72
  4. Step 4: Simplify right side
    867,395.64x = 598,129,173,984.90
  5. Step 5: Solve for x
    x = 598,129,173,984.90/867,395.64
  6. Step 6: Final answer
    x = 689,569.03

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.