Home / 641,878.32-885,799.08-355,403.64

Finding the Fourth Proportional to 641,878.32, 885,799.08 and 355,403.64

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Solution

The fourth proportional to 641,878.32, 885,799.08 and 355,403.64 is: 490,460.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,878.32 : 885,799.08 = 355,403.64 : x
  2. Step 2: Convert to fraction form
    641,878.32/885,799.08 = 355,403.64/x
  3. Step 3: Cross multiply
    641,878.32x = 885,799.08 × 355,403.64
  4. Step 4: Simplify right side
    641,878.32x = 314,816,217,340.65
  5. Step 5: Solve for x
    x = 314,816,217,340.65/641,878.32
  6. Step 6: Final answer
    x = 490,460.90

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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.