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Finding the Fourth Proportional to 5,325,319.20, 7,987,978.80 and 4,427,774.40

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Solution

The fourth proportional to 5,325,319.20, 7,987,978.80 and 4,427,774.40 is: 6,641,661.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,325,319.20 : 7,987,978.80 = 4,427,774.40 : x
  2. Step 2: Convert to fraction form
    5,325,319.20/7,987,978.80 = 4,427,774.40/x
  3. Step 3: Cross multiply
    5,325,319.20x = 7,987,978.80 × 4,427,774.40
  4. Step 4: Simplify right side
    5,325,319.20x = 35,368,968,038,382.72
  5. Step 5: Solve for x
    x = 35,368,968,038,382.72/5,325,319.20
  6. Step 6: Final answer
    x = 6,641,661.60

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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.