Home / 819,721.02-1,131,212.79-457,145.28

Finding the Fourth Proportional to 819,721.02, 1,131,212.79 and 457,145.28

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Solution

The fourth proportional to 819,721.02, 1,131,212.79 and 457,145.28 is: 630,859.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,721.02 : 1,131,212.79 = 457,145.28 : x
  2. Step 2: Convert to fraction form
    819,721.02/1,131,212.79 = 457,145.28/x
  3. Step 3: Cross multiply
    819,721.02x = 1,131,212.79 × 457,145.28
  4. Step 4: Simplify right side
    819,721.02x = 517,128,587,624.13
  5. Step 5: Solve for x
    x = 517,128,587,624.13/819,721.02
  6. Step 6: Final answer
    x = 630,859.25

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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.