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Finding the Fourth Proportional to 611,718.82, 917,587.47 and 212,372.28

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Solution

The fourth proportional to 611,718.82, 917,587.47 and 212,372.28 is: 318,561.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,718.82 : 917,587.47 = 212,372.28 : x
  2. Step 2: Convert to fraction form
    611,718.82/917,587.47 = 212,372.28/x
  3. Step 3: Cross multiply
    611,718.82x = 917,587.47 × 212,372.28
  4. Step 4: Simplify right side
    611,718.82x = 194,870,143,899.73
  5. Step 5: Solve for x
    x = 194,870,143,899.73/611,718.82
  6. Step 6: Final answer
    x = 318,561.63

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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.