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Finding the Fourth Proportional to 871,373.80, 1,307,060.70 and 310,426.60

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Solution

The fourth proportional to 871,373.80, 1,307,060.70 and 310,426.60 is: 465,639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,373.80 : 1,307,060.70 = 310,426.60 : x
  2. Step 2: Convert to fraction form
    871,373.80/1,307,060.70 = 310,426.60/x
  3. Step 3: Cross multiply
    871,373.80x = 1,307,060.70 × 310,426.60
  4. Step 4: Simplify right side
    871,373.80x = 405,746,409,094.62
  5. Step 5: Solve for x
    x = 405,746,409,094.62/871,373.80
  6. Step 6: Final answer
    x = 465,639.90

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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.