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Finding the Fourth Proportional to 786,274.62, 1,084,797.96 and 640,830.32

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Solution

The fourth proportional to 786,274.62, 1,084,797.96 and 640,830.32 is: 884,133.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,274.62 : 1,084,797.96 = 640,830.32 : x
  2. Step 2: Convert to fraction form
    786,274.62/1,084,797.96 = 640,830.32/x
  3. Step 3: Cross multiply
    786,274.62x = 1,084,797.96 × 640,830.32
  4. Step 4: Simplify right side
    786,274.62x = 695,171,423,842.15
  5. Step 5: Solve for x
    x = 695,171,423,842.15/786,274.62
  6. Step 6: Final answer
    x = 884,133.11

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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.