Home / 591,995.12-816,408.14-387,971.72

Finding the Fourth Proportional to 591,995.12, 816,408.14 and 387,971.72

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Solution

The fourth proportional to 591,995.12, 816,408.14 and 387,971.72 is: 535,043.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,995.12 : 816,408.14 = 387,971.72 : x
  2. Step 2: Convert to fraction form
    591,995.12/816,408.14 = 387,971.72/x
  3. Step 3: Cross multiply
    591,995.12x = 816,408.14 × 387,971.72
  4. Step 4: Simplify right side
    591,995.12x = 316,743,264,275.90
  5. Step 5: Solve for x
    x = 316,743,264,275.90/591,995.12
  6. Step 6: Final answer
    x = 535,043.71

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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.