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Finding the Fourth Proportional to 690,550.78, 953,007.99 and 418,630.14

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Solution

The fourth proportional to 690,550.78, 953,007.99 and 418,630.14 is: 577,738.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,550.78 : 953,007.99 = 418,630.14 : x
  2. Step 2: Convert to fraction form
    690,550.78/953,007.99 = 418,630.14/x
  3. Step 3: Cross multiply
    690,550.78x = 953,007.99 × 418,630.14
  4. Step 4: Simplify right side
    690,550.78x = 398,957,868,274.82
  5. Step 5: Solve for x
    x = 398,957,868,274.82/690,550.78
  6. Step 6: Final answer
    x = 577,738.64

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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.