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Finding the Fourth Proportional to 641,959.07, 885,903.45 and 355,479.20

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Solution

The fourth proportional to 641,959.07, 885,903.45 and 355,479.20 is: 490,561.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,959.07 : 885,903.45 = 355,479.20 : x
  2. Step 2: Convert to fraction form
    641,959.07/885,903.45 = 355,479.20/x
  3. Step 3: Cross multiply
    641,959.07x = 885,903.45 × 355,479.20
  4. Step 4: Simplify right side
    641,959.07x = 314,920,245,253.72
  5. Step 5: Solve for x
    x = 314,920,245,253.72/641,959.07
  6. Step 6: Final answer
    x = 490,561.25

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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.