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Finding the Fourth Proportional to 640,339.28, 883,578.46 and 368,303.76

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Solution

The fourth proportional to 640,339.28, 883,578.46 and 368,303.76 is: 508,207.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,339.28 : 883,578.46 = 368,303.76 : x
  2. Step 2: Convert to fraction form
    640,339.28/883,578.46 = 368,303.76/x
  3. Step 3: Cross multiply
    640,339.28x = 883,578.46 × 368,303.76
  4. Step 4: Simplify right side
    640,339.28x = 325,425,269,073.01
  5. Step 5: Solve for x
    x = 325,425,269,073.01/640,339.28
  6. Step 6: Final answer
    x = 508,207.57

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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.