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Finding the Fourth Proportional to 640,637.32, 884,002.74 and 354,118.45

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Solution

The fourth proportional to 640,637.32, 884,002.74 and 354,118.45 is: 488,641.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,637.32 : 884,002.74 = 354,118.45 : x
  2. Step 2: Convert to fraction form
    640,637.32/884,002.74 = 354,118.45/x
  3. Step 3: Cross multiply
    640,637.32x = 884,002.74 × 354,118.45
  4. Step 4: Simplify right side
    640,637.32x = 313,041,680,084.55
  5. Step 5: Solve for x
    x = 313,041,680,084.55/640,637.32
  6. Step 6: Final answer
    x = 488,641.03

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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.