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Finding the Fourth Proportional to 819,760.72, 1,131,276 and 457,208.32

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Solution

The fourth proportional to 819,760.72, 1,131,276 and 457,208.32 is: 630,950.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,760.72 : 1,131,276 = 457,208.32 : x
  2. Step 2: Convert to fraction form
    819,760.72/1,131,276 = 457,208.32/x
  3. Step 3: Cross multiply
    819,760.72x = 1,131,276 × 457,208.32
  4. Step 4: Simplify right side
    819,760.72x = 517,228,799,416.32
  5. Step 5: Solve for x
    x = 517,228,799,416.32/819,760.72
  6. Step 6: Final answer
    x = 630,950.94

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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.