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Finding the Fourth Proportional to 719,363.45, 992,721.60 and 397,073.63

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Solution

The fourth proportional to 719,363.45, 992,721.60 and 397,073.63 is: 547,961.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,363.45 : 992,721.60 = 397,073.63 : x
  2. Step 2: Convert to fraction form
    719,363.45/992,721.60 = 397,073.63/x
  3. Step 3: Cross multiply
    719,363.45x = 992,721.60 × 397,073.63
  4. Step 4: Simplify right side
    719,363.45x = 394,183,564,327.80
  5. Step 5: Solve for x
    x = 394,183,564,327.80/719,363.45
  6. Step 6: Final answer
    x = 547,961.63

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Double scale
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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.