Home / 1,290,530.40-1,780,952.31-709,778.76

Finding the Fourth Proportional to 1,290,530.40, 1,780,952.31 and 709,778.76

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Solution

The fourth proportional to 1,290,530.40, 1,780,952.31 and 709,778.76 is: 979,505.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,530.40 : 1,780,952.31 = 709,778.76 : x
  2. Step 2: Convert to fraction form
    1,290,530.40/1,780,952.31 = 709,778.76/x
  3. Step 3: Cross multiply
    1,290,530.40x = 1,780,952.31 × 709,778.76
  4. Step 4: Simplify right side
    1,290,530.40x = 1,264,082,122,210.94
  5. Step 5: Solve for x
    x = 1,264,082,122,210.94/1,290,530.40
  6. Step 6: Final answer
    x = 979,505.89

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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.