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Finding the Fourth Proportional to 684,640.88, 944,731.72 and 378,668.64

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Solution

The fourth proportional to 684,640.88, 944,731.72 and 378,668.64 is: 522,522.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,640.88 : 944,731.72 = 378,668.64 : x
  2. Step 2: Convert to fraction form
    684,640.88/944,731.72 = 378,668.64/x
  3. Step 3: Cross multiply
    684,640.88x = 944,731.72 × 378,668.64
  4. Step 4: Simplify right side
    684,640.88x = 357,740,275,577.26
  5. Step 5: Solve for x
    x = 357,740,275,577.26/684,640.88
  6. Step 6: Final answer
    x = 522,522.52

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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.