Home / 709,733.43-979,431.71-387,443.45

Finding the Fourth Proportional to 709,733.43, 979,431.71 and 387,443.45

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Solution

The fourth proportional to 709,733.43, 979,431.71 and 387,443.45 is: 534,671.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,733.43 : 979,431.71 = 387,443.45 : x
  2. Step 2: Convert to fraction form
    709,733.43/979,431.71 = 387,443.45/x
  3. Step 3: Cross multiply
    709,733.43x = 979,431.71 × 387,443.45
  4. Step 4: Simplify right side
    709,733.43x = 379,474,393,927.42
  5. Step 5: Solve for x
    x = 379,474,393,927.42/709,733.43
  6. Step 6: Final answer
    x = 534,671.72

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Double scale
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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.