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Finding the Fourth Proportional to 640,033.64, 883,246.92 and 349,649.20

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Solution

The fourth proportional to 640,033.64, 883,246.92 and 349,649.20 is: 482,516.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,033.64 : 883,246.92 = 349,649.20 : x
  2. Step 2: Convert to fraction form
    640,033.64/883,246.92 = 349,649.20/x
  3. Step 3: Cross multiply
    640,033.64x = 883,246.92 × 349,649.20
  4. Step 4: Simplify right side
    640,033.64x = 308,826,578,980.46
  5. Step 5: Solve for x
    x = 308,826,578,980.46/640,033.64
  6. Step 6: Final answer
    x = 482,516.17

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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.