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Finding the Fourth Proportional to 661,719.80, 992,579.70 and 262,455.80

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Solution

The fourth proportional to 661,719.80, 992,579.70 and 262,455.80 is: 393,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,719.80 : 992,579.70 = 262,455.80 : x
  2. Step 2: Convert to fraction form
    661,719.80/992,579.70 = 262,455.80/x
  3. Step 3: Cross multiply
    661,719.80x = 992,579.70 × 262,455.80
  4. Step 4: Simplify right side
    661,719.80x = 260,508,299,227.26
  5. Step 5: Solve for x
    x = 260,508,299,227.26/661,719.80
  6. Step 6: Final answer
    x = 393,683.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.