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Finding the Fourth Proportional to 631,274.60, 946,911.90 and 315,617.60

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Solution

The fourth proportional to 631,274.60, 946,911.90 and 315,617.60 is: 473,426.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,274.60 : 946,911.90 = 315,617.60 : x
  2. Step 2: Convert to fraction form
    631,274.60/946,911.90 = 315,617.60/x
  3. Step 3: Cross multiply
    631,274.60x = 946,911.90 × 315,617.60
  4. Step 4: Simplify right side
    631,274.60x = 298,862,061,289.44
  5. Step 5: Solve for x
    x = 298,862,061,289.44/631,274.60
  6. Step 6: Final answer
    x = 473,426.40

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Half scale
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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.