Home / 778,405.12-1,074,174.72-438,868.48

Finding the Fourth Proportional to 778,405.12, 1,074,174.72 and 438,868.48

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Solution

The fourth proportional to 778,405.12, 1,074,174.72 and 438,868.48 is: 605,624.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,405.12 : 1,074,174.72 = 438,868.48 : x
  2. Step 2: Convert to fraction form
    778,405.12/1,074,174.72 = 438,868.48/x
  3. Step 3: Cross multiply
    778,405.12x = 1,074,174.72 × 438,868.48
  4. Step 4: Simplify right side
    778,405.12x = 471,421,426,620.83
  5. Step 5: Solve for x
    x = 471,421,426,620.83/778,405.12
  6. Step 6: Final answer
    x = 605,624.78

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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.