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Finding the Fourth Proportional to 612,799.84, 918,904.51 and 213,431.77

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Solution

The fourth proportional to 612,799.84, 918,904.51 and 213,431.77 is: 320,044.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,799.84 : 918,904.51 = 213,431.77 : x
  2. Step 2: Convert to fraction form
    612,799.84/918,904.51 = 213,431.77/x
  3. Step 3: Cross multiply
    612,799.84x = 918,904.51 × 213,431.77
  4. Step 4: Simplify right side
    612,799.84x = 196,123,413,199.44
  5. Step 5: Solve for x
    x = 196,123,413,199.44/612,799.84
  6. Step 6: Final answer
    x = 320,044.82

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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.