Home / 641,947.47-885,876.68-355,461.40

Finding the Fourth Proportional to 641,947.47, 885,876.68 and 355,461.40

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Solution

The fourth proportional to 641,947.47, 885,876.68 and 355,461.40 is: 490,530.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,947.47 : 885,876.68 = 355,461.40 : x
  2. Step 2: Convert to fraction form
    641,947.47/885,876.68 = 355,461.40/x
  3. Step 3: Cross multiply
    641,947.47x = 885,876.68 × 355,461.40
  4. Step 4: Simplify right side
    641,947.47x = 314,894,964,900.15
  5. Step 5: Solve for x
    x = 314,894,964,900.15/641,947.47
  6. Step 6: Final answer
    x = 490,530.74

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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.