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Finding the Fourth Proportional to 390,459.60, 585,076.80 and 232,601.76

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Solution

The fourth proportional to 390,459.60, 585,076.80 and 232,601.76 is: 348,537.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,459.60 : 585,076.80 = 232,601.76 : x
  2. Step 2: Convert to fraction form
    390,459.60/585,076.80 = 232,601.76/x
  3. Step 3: Cross multiply
    390,459.60x = 585,076.80 × 232,601.76
  4. Step 4: Simplify right side
    390,459.60x = 136,089,893,415.17
  5. Step 5: Solve for x
    x = 136,089,893,415.17/390,459.60
  6. Step 6: Final answer
    x = 348,537.71

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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.