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Finding the Fourth Proportional to 769,502.57, 1,061,894.99 and 420,627.47

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Solution

The fourth proportional to 769,502.57, 1,061,894.99 and 420,627.47 is: 580,455.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,502.57 : 1,061,894.99 = 420,627.47 : x
  2. Step 2: Convert to fraction form
    769,502.57/1,061,894.99 = 420,627.47/x
  3. Step 3: Cross multiply
    769,502.57x = 1,061,894.99 × 420,627.47
  4. Step 4: Simplify right side
    769,502.57x = 446,662,195,636.76
  5. Step 5: Solve for x
    x = 446,662,195,636.76/769,502.57
  6. Step 6: Final answer
    x = 580,455.76

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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.