Home / 1,290,345.85-1,780,723.07-709,613.13

Finding the Fourth Proportional to 1,290,345.85, 1,780,723.07 and 709,613.13

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Solution

The fourth proportional to 1,290,345.85, 1,780,723.07 and 709,613.13 is: 979,291.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,345.85 : 1,780,723.07 = 709,613.13 : x
  2. Step 2: Convert to fraction form
    1,290,345.85/1,780,723.07 = 709,613.13/x
  3. Step 3: Cross multiply
    1,290,345.85x = 1,780,723.07 × 709,613.13
  4. Step 4: Simplify right side
    1,290,345.85x = 1,263,624,471,365.91
  5. Step 5: Solve for x
    x = 1,263,624,471,365.91/1,290,345.85
  6. Step 6: Final answer
    x = 979,291.31

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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.