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Finding the Fourth Proportional to 631,142.40, 946,252.80 and 256,972.80

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Solution

The fourth proportional to 631,142.40, 946,252.80 and 256,972.80 is: 385,271.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,142.40 : 946,252.80 = 256,972.80 : x
  2. Step 2: Convert to fraction form
    631,142.40/946,252.80 = 256,972.80/x
  3. Step 3: Cross multiply
    631,142.40x = 946,252.80 × 256,972.80
  4. Step 4: Simplify right side
    631,142.40x = 243,161,231,523.84
  5. Step 5: Solve for x
    x = 243,161,231,523.84/631,142.40
  6. Step 6: Final answer
    x = 385,271.58

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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.