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Finding the Fourth Proportional to 819,713.79, 1,131,202.80 and 457,138.04

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Solution

The fourth proportional to 819,713.79, 1,131,202.80 and 457,138.04 is: 630,849.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,713.79 : 1,131,202.80 = 457,138.04 : x
  2. Step 2: Convert to fraction form
    819,713.79/1,131,202.80 = 457,138.04/x
  3. Step 3: Cross multiply
    819,713.79x = 1,131,202.80 × 457,138.04
  4. Step 4: Simplify right side
    819,713.79x = 517,115,830,834.51
  5. Step 5: Solve for x
    x = 517,115,830,834.51/819,713.79
  6. Step 6: Final answer
    x = 630,849.25

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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.