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Finding the Fourth Proportional to 278,847.40, 418,271.10 and 253,915.60

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Solution

The fourth proportional to 278,847.40, 418,271.10 and 253,915.60 is: 380,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,847.40 : 418,271.10 = 253,915.60 : x
  2. Step 2: Convert to fraction form
    278,847.40/418,271.10 = 253,915.60/x
  3. Step 3: Cross multiply
    278,847.40x = 418,271.10 × 253,915.60
  4. Step 4: Simplify right side
    278,847.40x = 106,205,557,319.16
  5. Step 5: Solve for x
    x = 106,205,557,319.16/278,847.40
  6. Step 6: Final answer
    x = 380,873.40

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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.