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Finding the Fourth Proportional to 641,959.86, 885,904.06 and 355,479.94

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Solution

The fourth proportional to 641,959.86, 885,904.06 and 355,479.94 is: 490,562.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,959.86 : 885,904.06 = 355,479.94 : x
  2. Step 2: Convert to fraction form
    641,959.86/885,904.06 = 355,479.94/x
  3. Step 3: Cross multiply
    641,959.86x = 885,904.06 × 355,479.94
  4. Step 4: Simplify right side
    641,959.86x = 314,921,122,094.56
  5. Step 5: Solve for x
    x = 314,921,122,094.56/641,959.86
  6. Step 6: Final answer
    x = 490,562.01

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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.