Home / 645,257.60-966,734.40-312,099.20

Finding the Fourth Proportional to 645,257.60, 966,734.40 and 312,099.20

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Solution

The fourth proportional to 645,257.60, 966,734.40 and 312,099.20 is: 467,591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,257.60 : 966,734.40 = 312,099.20 : x
  2. Step 2: Convert to fraction form
    645,257.60/966,734.40 = 312,099.20/x
  3. Step 3: Cross multiply
    645,257.60x = 966,734.40 × 312,099.20
  4. Step 4: Simplify right side
    645,257.60x = 301,717,032,852.48
  5. Step 5: Solve for x
    x = 301,717,032,852.48/645,257.60
  6. Step 6: Final answer
    x = 467,591.60

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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.