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Finding the Fourth Proportional to 431,478.72, 595,443.39 and 240,504.21

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Solution

The fourth proportional to 431,478.72, 595,443.39 and 240,504.21 is: 331,897.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,478.72 : 595,443.39 = 240,504.21 : x
  2. Step 2: Convert to fraction form
    431,478.72/595,443.39 = 240,504.21/x
  3. Step 3: Cross multiply
    431,478.72x = 595,443.39 × 240,504.21
  4. Step 4: Simplify right side
    431,478.72x = 143,206,642,111.67
  5. Step 5: Solve for x
    x = 143,206,642,111.67/431,478.72
  6. Step 6: Final answer
    x = 331,897.35

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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.