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Finding the Fourth Proportional to 5,280,779.60, 7,938,082.20 and 4,906,365.20

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Solution

The fourth proportional to 5,280,779.60, 7,938,082.20 and 4,906,365.20 is: 7,375,261.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280,779.60 : 7,938,082.20 = 4,906,365.20 : x
  2. Step 2: Convert to fraction form
    5,280,779.60/7,938,082.20 = 4,906,365.20/x
  3. Step 3: Cross multiply
    5,280,779.60x = 7,938,082.20 × 4,906,365.20
  4. Step 4: Simplify right side
    5,280,779.60x = 38,947,130,260,819.45
  5. Step 5: Solve for x
    x = 38,947,130,260,819.45/5,280,779.60
  6. Step 6: Final answer
    x = 7,375,261.46

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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.