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Finding the Fourth Proportional to 698,979.78, 963,430.38 and 494,768.70

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Solution

The fourth proportional to 698,979.78, 963,430.38 and 494,768.70 is: 681,958.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,979.78 : 963,430.38 = 494,768.70 : x
  2. Step 2: Convert to fraction form
    698,979.78/963,430.38 = 494,768.70/x
  3. Step 3: Cross multiply
    698,979.78x = 963,430.38 × 494,768.70
  4. Step 4: Simplify right side
    698,979.78x = 476,675,196,653.11
  5. Step 5: Solve for x
    x = 476,675,196,653.11/698,979.78
  6. Step 6: Final answer
    x = 681,958.49

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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.