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Finding the Fourth Proportional to 390,045, 585,067.50 and 94,557

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Solution

The fourth proportional to 390,045, 585,067.50 and 94,557 is: 141,835.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,045 : 585,067.50 = 94,557 : x
  2. Step 2: Convert to fraction form
    390,045/585,067.50 = 94,557/x
  3. Step 3: Cross multiply
    390,045x = 585,067.50 × 94,557
  4. Step 4: Simplify right side
    390,045x = 55,322,227,597.50
  5. Step 5: Solve for x
    x = 55,322,227,597.50/390,045
  6. Step 6: Final answer
    x = 141,835.50

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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.