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Finding the Fourth Proportional to 660,397.40, 990,596.10 and 161,761.40

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Solution

The fourth proportional to 660,397.40, 990,596.10 and 161,761.40 is: 242,642.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,397.40 : 990,596.10 = 161,761.40 : x
  2. Step 2: Convert to fraction form
    660,397.40/990,596.10 = 161,761.40/x
  3. Step 3: Cross multiply
    660,397.40x = 990,596.10 × 161,761.40
  4. Step 4: Simplify right side
    660,397.40x = 160,240,211,970.54
  5. Step 5: Solve for x
    x = 160,240,211,970.54/660,397.40
  6. Step 6: Final answer
    x = 242,642.10

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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.