Home / 1,290,471.12-1,780,803.54-709,689.24

Finding the Fourth Proportional to 1,290,471.12, 1,780,803.54 and 709,689.24

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Solution

The fourth proportional to 1,290,471.12, 1,780,803.54 and 709,689.24 is: 979,345.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,471.12 : 1,780,803.54 = 709,689.24 : x
  2. Step 2: Convert to fraction form
    1,290,471.12/1,780,803.54 = 709,689.24/x
  3. Step 3: Cross multiply
    1,290,471.12x = 1,780,803.54 × 709,689.24
  4. Step 4: Simplify right side
    1,290,471.12x = 1,263,817,110,891.91
  5. Step 5: Solve for x
    x = 1,263,817,110,891.91/1,290,471.12
  6. Step 6: Final answer
    x = 979,345.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.