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Finding the Fourth Proportional to 704,797.95, 972,620.78 and 398,868.77

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Solution

The fourth proportional to 704,797.95, 972,620.78 and 398,868.77 is: 550,438.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,797.95 : 972,620.78 = 398,868.77 : x
  2. Step 2: Convert to fraction form
    704,797.95/972,620.78 = 398,868.77/x
  3. Step 3: Cross multiply
    704,797.95x = 972,620.78 × 398,868.77
  4. Step 4: Simplify right side
    704,797.95x = 387,948,054,195.04
  5. Step 5: Solve for x
    x = 387,948,054,195.04/704,797.95
  6. Step 6: Final answer
    x = 550,438.68

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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.