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Finding the Fourth Proportional to 524,791.80, 786,021.30 and 431,479.80

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Solution

The fourth proportional to 524,791.80, 786,021.30 and 431,479.80 is: 646,260.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,791.80 : 786,021.30 = 431,479.80 : x
  2. Step 2: Convert to fraction form
    524,791.80/786,021.30 = 431,479.80/x
  3. Step 3: Cross multiply
    524,791.80x = 786,021.30 × 431,479.80
  4. Step 4: Simplify right side
    524,791.80x = 339,152,313,319.74
  5. Step 5: Solve for x
    x = 339,152,313,319.74/524,791.80
  6. Step 6: Final answer
    x = 646,260.69

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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.