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Finding the Fourth Proportional to 640,079.88, 883,307.44 and 353,599.96

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Solution

The fourth proportional to 640,079.88, 883,307.44 and 353,599.96 is: 487,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,079.88 : 883,307.44 = 353,599.96 : x
  2. Step 2: Convert to fraction form
    640,079.88/883,307.44 = 353,599.96/x
  3. Step 3: Cross multiply
    640,079.88x = 883,307.44 × 353,599.96
  4. Step 4: Simplify right side
    640,079.88x = 312,337,475,451.70
  5. Step 5: Solve for x
    x = 312,337,475,451.70/640,079.88
  6. Step 6: Final answer
    x = 487,966.40

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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.