Home / 709,890.45-979,641.39-387,599.55

Finding the Fourth Proportional to 709,890.45, 979,641.39 and 387,599.55

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Solution

The fourth proportional to 709,890.45, 979,641.39 and 387,599.55 is: 534,883.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,890.45 : 979,641.39 = 387,599.55 : x
  2. Step 2: Convert to fraction form
    709,890.45/979,641.39 = 387,599.55/x
  3. Step 3: Cross multiply
    709,890.45x = 979,641.39 × 387,599.55
  4. Step 4: Simplify right side
    709,890.45x = 379,708,559,705.22
  5. Step 5: Solve for x
    x = 379,708,559,705.22/709,890.45
  6. Step 6: Final answer
    x = 534,883.32

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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.