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Finding the Fourth Proportional to 1,275,933.79, 1,913,837.04 and 477,156.61

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Solution

The fourth proportional to 1,275,933.79, 1,913,837.04 and 477,156.61 is: 715,711.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275,933.79 : 1,913,837.04 = 477,156.61 : x
  2. Step 2: Convert to fraction form
    1,275,933.79/1,913,837.04 = 477,156.61/x
  3. Step 3: Cross multiply
    1,275,933.79x = 1,913,837.04 × 477,156.61
  4. Step 4: Simplify right side
    1,275,933.79x = 913,199,994,098.83
  5. Step 5: Solve for x
    x = 913,199,994,098.83/1,275,933.79
  6. Step 6: Final answer
    x = 715,711.11

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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.