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Finding the Fourth Proportional to 772,871.12, 1,066,508.48 and 428,674.40

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Solution

The fourth proportional to 772,871.12, 1,066,508.48 and 428,674.40 is: 591,540.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,871.12 : 1,066,508.48 = 428,674.40 : x
  2. Step 2: Convert to fraction form
    772,871.12/1,066,508.48 = 428,674.40/x
  3. Step 3: Cross multiply
    772,871.12x = 1,066,508.48 × 428,674.40
  4. Step 4: Simplify right side
    772,871.12x = 457,184,882,758.91
  5. Step 5: Solve for x
    x = 457,184,882,758.91/772,871.12
  6. Step 6: Final answer
    x = 591,540.91

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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.