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Finding the Fourth Proportional to 328,541.70, 492,812.55 and 91,902.90

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Solution

The fourth proportional to 328,541.70, 492,812.55 and 91,902.90 is: 137,854.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,541.70 : 492,812.55 = 91,902.90 : x
  2. Step 2: Convert to fraction form
    328,541.70/492,812.55 = 91,902.90/x
  3. Step 3: Cross multiply
    328,541.70x = 492,812.55 × 91,902.90
  4. Step 4: Simplify right side
    328,541.70x = 45,290,902,501.40
  5. Step 5: Solve for x
    x = 45,290,902,501.40/328,541.70
  6. Step 6: Final answer
    x = 137,854.35

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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.