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Finding the Fourth Proportional to 719,311.70, 992,579.46 and 397,001.10

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Solution

The fourth proportional to 719,311.70, 992,579.46 and 397,001.10 is: 547,822.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,311.70 : 992,579.46 = 397,001.10 : x
  2. Step 2: Convert to fraction form
    719,311.70/992,579.46 = 397,001.10/x
  3. Step 3: Cross multiply
    719,311.70x = 992,579.46 × 397,001.10
  4. Step 4: Simplify right side
    719,311.70x = 394,055,137,457.41
  5. Step 5: Solve for x
    x = 394,055,137,457.41/719,311.70
  6. Step 6: Final answer
    x = 547,822.51

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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.