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Finding the Fourth Proportional to 390,513.89, 585,546.63 and 153,727.40

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Solution

The fourth proportional to 390,513.89, 585,546.63 and 153,727.40 is: 230,502.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,513.89 : 585,546.63 = 153,727.40 : x
  2. Step 2: Convert to fraction form
    390,513.89/585,546.63 = 153,727.40/x
  3. Step 3: Cross multiply
    390,513.89x = 585,546.63 × 153,727.40
  4. Step 4: Simplify right side
    390,513.89x = 90,014,561,008.66
  5. Step 5: Solve for x
    x = 90,014,561,008.66/390,513.89
  6. Step 6: Final answer
    x = 230,502.84

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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.