Home / 641,965.18-885,901.08-355,479.13

Finding the Fourth Proportional to 641,965.18, 885,901.08 and 355,479.13

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Solution

The fourth proportional to 641,965.18, 885,901.08 and 355,479.13 is: 490,555.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,965.18 : 885,901.08 = 355,479.13 : x
  2. Step 2: Convert to fraction form
    641,965.18/885,901.08 = 355,479.13/x
  3. Step 3: Cross multiply
    641,965.18x = 885,901.08 × 355,479.13
  4. Step 4: Simplify right side
    641,965.18x = 314,919,345,184.46
  5. Step 5: Solve for x
    x = 314,919,345,184.46/641,965.18
  6. Step 6: Final answer
    x = 490,555.18

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Double scale
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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.