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Finding the Fourth Proportional to 640,288.43, 883,764 and 368,384.16

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Solution

The fourth proportional to 640,288.43, 883,764 and 368,384.16 is: 508,465.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,288.43 : 883,764 = 368,384.16 : x
  2. Step 2: Convert to fraction form
    640,288.43/883,764 = 368,384.16/x
  3. Step 3: Cross multiply
    640,288.43x = 883,764 × 368,384.16
  4. Step 4: Simplify right side
    640,288.43x = 325,564,658,778.24
  5. Step 5: Solve for x
    x = 325,564,658,778.24/640,288.43
  6. Step 6: Final answer
    x = 508,465.63

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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.