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Finding the Fourth Proportional to 310,915.20, 436,387.20 and 310,915.20

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Solution

The fourth proportional to 310,915.20, 436,387.20 and 310,915.20 is: 436,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,915.20 : 436,387.20 = 310,915.20 : x
  2. Step 2: Convert to fraction form
    310,915.20/436,387.20 = 310,915.20/x
  3. Step 3: Cross multiply
    310,915.20x = 436,387.20 × 310,915.20
  4. Step 4: Simplify right side
    310,915.20x = 135,679,413,565.44
  5. Step 5: Solve for x
    x = 135,679,413,565.44/310,915.20
  6. Step 6: Final answer
    x = 436,387.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.