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Finding the Fourth Proportional to 709,751.25, 979,455.78 and 455,101.83

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Solution

The fourth proportional to 709,751.25, 979,455.78 and 455,101.83 is: 628,039.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,751.25 : 979,455.78 = 455,101.83 : x
  2. Step 2: Convert to fraction form
    709,751.25/979,455.78 = 455,101.83/x
  3. Step 3: Cross multiply
    709,751.25x = 979,455.78 × 455,101.83
  4. Step 4: Simplify right side
    709,751.25x = 445,752,119,588.71
  5. Step 5: Solve for x
    x = 445,752,119,588.71/709,751.25
  6. Step 6: Final answer
    x = 628,039.92

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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.