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Finding the Fourth Proportional to 457,718.60, 686,577.90 and 208,886.60

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Solution

The fourth proportional to 457,718.60, 686,577.90 and 208,886.60 is: 313,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,718.60 : 686,577.90 = 208,886.60 : x
  2. Step 2: Convert to fraction form
    457,718.60/686,577.90 = 208,886.60/x
  3. Step 3: Cross multiply
    457,718.60x = 686,577.90 × 208,886.60
  4. Step 4: Simplify right side
    457,718.60x = 143,416,923,166.14
  5. Step 5: Solve for x
    x = 143,416,923,166.14/457,718.60
  6. Step 6: Final answer
    x = 313,329.90

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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.