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Finding the Fourth Proportional to 1,275,917.03, 1,913,811.95 and 477,139.85

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Solution

The fourth proportional to 1,275,917.03, 1,913,811.95 and 477,139.85 is: 715,685.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275,917.03 : 1,913,811.95 = 477,139.85 : x
  2. Step 2: Convert to fraction form
    1,275,917.03/1,913,811.95 = 477,139.85/x
  3. Step 3: Cross multiply
    1,275,917.03x = 1,913,811.95 × 477,139.85
  4. Step 4: Simplify right side
    1,275,917.03x = 913,155,934,796.45
  5. Step 5: Solve for x
    x = 913,155,934,796.45/1,275,917.03
  6. Step 6: Final answer
    x = 715,685.99

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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.