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Finding the Fourth Proportional to 28,400,138.40, 42,600,207.60 and 28,400,138.40

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Solution

The fourth proportional to 28,400,138.40, 42,600,207.60 and 28,400,138.40 is: 42,600,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400,138.40 : 42,600,207.60 = 28,400,138.40 : x
  2. Step 2: Convert to fraction form
    28,400,138.40/42,600,207.60 = 28,400,138.40/x
  3. Step 3: Cross multiply
    28,400,138.40x = 42,600,207.60 × 28,400,138.40
  4. Step 4: Simplify right side
    28,400,138.40x = 1,209,851,791,708,731.75
  5. Step 5: Solve for x
    x = 1,209,851,791,708,731.75/28,400,138.40
  6. Step 6: Final answer
    x = 42,600,207.60

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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.