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Finding the Fourth Proportional to 391,526.80, 587,290.20 and 343,315.60

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Solution

The fourth proportional to 391,526.80, 587,290.20 and 343,315.60 is: 514,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,526.80 : 587,290.20 = 343,315.60 : x
  2. Step 2: Convert to fraction form
    391,526.80/587,290.20 = 343,315.60/x
  3. Step 3: Cross multiply
    391,526.80x = 587,290.20 × 343,315.60
  4. Step 4: Simplify right side
    391,526.80x = 201,625,887,387.12
  5. Step 5: Solve for x
    x = 201,625,887,387.12/391,526.80
  6. Step 6: Final answer
    x = 514,973.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.