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Finding the Fourth Proportional to 661,014.40, 991,521.60 and 162,378.40

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Solution

The fourth proportional to 661,014.40, 991,521.60 and 162,378.40 is: 243,567.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,014.40 : 991,521.60 = 162,378.40 : x
  2. Step 2: Convert to fraction form
    661,014.40/991,521.60 = 162,378.40/x
  3. Step 3: Cross multiply
    661,014.40x = 991,521.60 × 162,378.40
  4. Step 4: Simplify right side
    661,014.40x = 161,001,690,973.44
  5. Step 5: Solve for x
    x = 161,001,690,973.44/661,014.40
  6. Step 6: Final answer
    x = 243,567.60

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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.