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Finding the Fourth Proportional to 542,868.63, 814,718.65 and 390,992.76

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Solution

The fourth proportional to 542,868.63, 814,718.65 and 390,992.76 is: 586,788.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,868.63 : 814,718.65 = 390,992.76 : x
  2. Step 2: Convert to fraction form
    542,868.63/814,718.65 = 390,992.76/x
  3. Step 3: Cross multiply
    542,868.63x = 814,718.65 × 390,992.76
  4. Step 4: Simplify right side
    542,868.63x = 318,549,093,586.97
  5. Step 5: Solve for x
    x = 318,549,093,586.97/542,868.63
  6. Step 6: Final answer
    x = 586,788.55

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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.