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Finding the Fourth Proportional to 565,209.43, 779,559.55 and 391,069.55

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Solution

The fourth proportional to 565,209.43, 779,559.55 and 391,069.55 is: 539,378.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,209.43 : 779,559.55 = 391,069.55 : x
  2. Step 2: Convert to fraction form
    565,209.43/779,559.55 = 391,069.55/x
  3. Step 3: Cross multiply
    565,209.43x = 779,559.55 × 391,069.55
  4. Step 4: Simplify right side
    565,209.43x = 304,862,003,387.93
  5. Step 5: Solve for x
    x = 304,862,003,387.93/565,209.43
  6. Step 6: Final answer
    x = 539,378.84

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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.