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Finding the Fourth Proportional to 4,813,978.80, 7,219,218.60 and 1,619,209.20

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Solution

The fourth proportional to 4,813,978.80, 7,219,218.60 and 1,619,209.20 is: 2,428,225.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,813,978.80 : 7,219,218.60 = 1,619,209.20 : x
  2. Step 2: Convert to fraction form
    4,813,978.80/7,219,218.60 = 1,619,209.20/x
  3. Step 3: Cross multiply
    4,813,978.80x = 7,219,218.60 × 1,619,209.20
  4. Step 4: Simplify right side
    4,813,978.80x = 11,689,425,173,931.12
  5. Step 5: Solve for x
    x = 11,689,425,173,931.12/4,813,978.80
  6. Step 6: Final answer
    x = 2,428,225.31

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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.