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Finding the Fourth Proportional to 640,423.32, 883,818.36 and 368,532.60

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Solution

The fourth proportional to 640,423.32, 883,818.36 and 368,532.60 is: 508,594.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,423.32 : 883,818.36 = 368,532.60 : x
  2. Step 2: Convert to fraction form
    640,423.32/883,818.36 = 368,532.60/x
  3. Step 3: Cross multiply
    640,423.32x = 883,818.36 × 368,532.60
  4. Step 4: Simplify right side
    640,423.32x = 325,715,878,138.54
  5. Step 5: Solve for x
    x = 325,715,878,138.54/640,423.32
  6. Step 6: Final answer
    x = 508,594.66

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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.