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Finding the Fourth Proportional to 390,342.72, 585,514.08 and 94,854.72

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Solution

The fourth proportional to 390,342.72, 585,514.08 and 94,854.72 is: 142,282.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,342.72 : 585,514.08 = 94,854.72 : x
  2. Step 2: Convert to fraction form
    390,342.72/585,514.08 = 94,854.72/x
  3. Step 3: Cross multiply
    390,342.72x = 585,514.08 × 94,854.72
  4. Step 4: Simplify right side
    390,342.72x = 55,538,774,114.46
  5. Step 5: Solve for x
    x = 55,538,774,114.46/390,342.72
  6. Step 6: Final answer
    x = 142,282.08

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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.