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Finding the Fourth Proportional to 665,889.48, 918,879.66 and 411,244.92

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Solution

The fourth proportional to 665,889.48, 918,879.66 and 411,244.92 is: 567,488.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,889.48 : 918,879.66 = 411,244.92 : x
  2. Step 2: Convert to fraction form
    665,889.48/918,879.66 = 411,244.92/x
  3. Step 3: Cross multiply
    665,889.48x = 918,879.66 × 411,244.92
  4. Step 4: Simplify right side
    665,889.48x = 377,884,592,266.33
  5. Step 5: Solve for x
    x = 377,884,592,266.33/665,889.48
  6. Step 6: Final answer
    x = 567,488.46

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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.