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Finding the Fourth Proportional to 640,112.64, 883,373.28 and 353,651.20

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Solution

The fourth proportional to 640,112.64, 883,373.28 and 353,651.20 is: 488,048.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,112.64 : 883,373.28 = 353,651.20 : x
  2. Step 2: Convert to fraction form
    640,112.64/883,373.28 = 353,651.20/x
  3. Step 3: Cross multiply
    640,112.64x = 883,373.28 × 353,651.20
  4. Step 4: Simplify right side
    640,112.64x = 312,406,020,519.94
  5. Step 5: Solve for x
    x = 312,406,020,519.94/640,112.64
  6. Step 6: Final answer
    x = 488,048.51

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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.