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Finding the Fourth Proportional to 641,959.49, 885,903.55 and 355,479.57

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Solution

The fourth proportional to 641,959.49, 885,903.55 and 355,479.57 is: 490,561.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,959.49 : 885,903.55 = 355,479.57 : x
  2. Step 2: Convert to fraction form
    641,959.49/885,903.55 = 355,479.57/x
  3. Step 3: Cross multiply
    641,959.49x = 885,903.55 × 355,479.57
  4. Step 4: Simplify right side
    641,959.49x = 314,920,612,126.78
  5. Step 5: Solve for x
    x = 314,920,612,126.78/641,959.49
  6. Step 6: Final answer
    x = 490,561.50

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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.