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Finding the Fourth Proportional to 591,959.61, 815,788.19 and 428,339.21

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Solution

The fourth proportional to 591,959.61, 815,788.19 and 428,339.21 is: 590,300.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,959.61 : 815,788.19 = 428,339.21 : x
  2. Step 2: Convert to fraction form
    591,959.61/815,788.19 = 428,339.21/x
  3. Step 3: Cross multiply
    591,959.61x = 815,788.19 × 428,339.21
  4. Step 4: Simplify right side
    591,959.61x = 349,434,065,823.84
  5. Step 5: Solve for x
    x = 349,434,065,823.84/591,959.61
  6. Step 6: Final answer
    x = 590,300.52

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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.