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Finding the Fourth Proportional to 390,062.39, 585,113.63 and 109,601.51

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Solution

The fourth proportional to 390,062.39, 585,113.63 and 109,601.51 is: 164,407.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,062.39 : 585,113.63 = 109,601.51 : x
  2. Step 2: Convert to fraction form
    390,062.39/585,113.63 = 109,601.51/x
  3. Step 3: Cross multiply
    390,062.39x = 585,113.63 × 109,601.51
  4. Step 4: Simplify right side
    390,062.39x = 64,129,333,896.01
  5. Step 5: Solve for x
    x = 64,129,333,896.01/390,062.39
  6. Step 6: Final answer
    x = 164,407.89

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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.