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Finding the Fourth Proportional to 390,673.08, 586,027.44 and 124,408.56

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Solution

The fourth proportional to 390,673.08, 586,027.44 and 124,408.56 is: 186,618.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,673.08 : 586,027.44 = 124,408.56 : x
  2. Step 2: Convert to fraction form
    390,673.08/586,027.44 = 124,408.56/x
  3. Step 3: Cross multiply
    390,673.08x = 586,027.44 × 124,408.56
  4. Step 4: Simplify right side
    390,673.08x = 72,906,829,930.89
  5. Step 5: Solve for x
    x = 72,906,829,930.89/390,673.08
  6. Step 6: Final answer
    x = 186,618.51

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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.