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Finding the Fourth Proportional to 819,959.16, 1,131,430.50 and 457,340.52

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Solution

The fourth proportional to 819,959.16, 1,131,430.50 and 457,340.52 is: 631,066.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,959.16 : 1,131,430.50 = 457,340.52 : x
  2. Step 2: Convert to fraction form
    819,959.16/1,131,430.50 = 457,340.52/x
  3. Step 3: Cross multiply
    819,959.16x = 1,131,430.50 × 457,340.52
  4. Step 4: Simplify right side
    819,959.16x = 517,449,013,213.86
  5. Step 5: Solve for x
    x = 517,449,013,213.86/819,959.16
  6. Step 6: Final answer
    x = 631,066.81

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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.