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Finding the Fourth Proportional to 640,336.28, 883,574.32 and 368,300.76

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Solution

The fourth proportional to 640,336.28, 883,574.32 and 368,300.76 is: 508,203.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,336.28 : 883,574.32 = 368,300.76 : x
  2. Step 2: Convert to fraction form
    640,336.28/883,574.32 = 368,300.76/x
  3. Step 3: Cross multiply
    640,336.28x = 883,574.32 × 368,300.76
  4. Step 4: Simplify right side
    640,336.28x = 325,421,093,572.48
  5. Step 5: Solve for x
    x = 325,421,093,572.48/640,336.28
  6. Step 6: Final answer
    x = 508,203.43

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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.