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Finding the Fourth Proportional to 642,672.60, 964,008.90 and 310,896.60

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Solution

The fourth proportional to 642,672.60, 964,008.90 and 310,896.60 is: 466,344.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,672.60 : 964,008.90 = 310,896.60 : x
  2. Step 2: Convert to fraction form
    642,672.60/964,008.90 = 310,896.60/x
  3. Step 3: Cross multiply
    642,672.60x = 964,008.90 × 310,896.60
  4. Step 4: Simplify right side
    642,672.60x = 299,707,089,379.74
  5. Step 5: Solve for x
    x = 299,707,089,379.74/642,672.60
  6. Step 6: Final answer
    x = 466,344.90

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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.