Home / 709,895.55-979,648.42-387,604.65

Finding the Fourth Proportional to 709,895.55, 979,648.42 and 387,604.65

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Solution

The fourth proportional to 709,895.55, 979,648.42 and 387,604.65 is: 534,890.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,895.55 : 979,648.42 = 387,604.65 : x
  2. Step 2: Convert to fraction form
    709,895.55/979,648.42 = 387,604.65/x
  3. Step 3: Cross multiply
    709,895.55x = 979,648.42 × 387,604.65
  4. Step 4: Simplify right side
    709,895.55x = 379,716,282,957.15
  5. Step 5: Solve for x
    x = 379,716,282,957.15/709,895.55
  6. Step 6: Final answer
    x = 534,890.36

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1.5x scale

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.