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Finding the Fourth Proportional to 390,833.77, 586,297.94 and 138,062.53

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Solution

The fourth proportional to 390,833.77, 586,297.94 and 138,062.53 is: 207,110.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,833.77 : 586,297.94 = 138,062.53 : x
  2. Step 2: Convert to fraction form
    390,833.77/586,297.94 = 138,062.53/x
  3. Step 3: Cross multiply
    390,833.77x = 586,297.94 × 138,062.53
  4. Step 4: Simplify right side
    390,833.77x = 80,945,779,010.01
  5. Step 5: Solve for x
    x = 80,945,779,010.01/390,833.77
  6. Step 6: Final answer
    x = 207,110.51

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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.