Home / 390,788.86-585,877.06-154,308.54

Finding the Fourth Proportional to 390,788.86, 585,877.06 and 154,308.54

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Solution

The fourth proportional to 390,788.86, 585,877.06 and 154,308.54 is: 231,341.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,788.86 : 585,877.06 = 154,308.54 : x
  2. Step 2: Convert to fraction form
    390,788.86/585,877.06 = 154,308.54/x
  3. Step 3: Cross multiply
    390,788.86x = 585,877.06 × 154,308.54
  4. Step 4: Simplify right side
    390,788.86x = 90,405,833,748.09
  5. Step 5: Solve for x
    x = 90,405,833,748.09/390,788.86
  6. Step 6: Final answer
    x = 231,341.89

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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.