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Finding the Fourth Proportional to 390,008.50, 585,012.75 and 94,520.50

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Solution

The fourth proportional to 390,008.50, 585,012.75 and 94,520.50 is: 141,780.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,008.50 : 585,012.75 = 94,520.50 : x
  2. Step 2: Convert to fraction form
    390,008.50/585,012.75 = 94,520.50/x
  3. Step 3: Cross multiply
    390,008.50x = 585,012.75 × 94,520.50
  4. Step 4: Simplify right side
    390,008.50x = 55,295,697,636.38
  5. Step 5: Solve for x
    x = 55,295,697,636.38/390,008.50
  6. Step 6: Final answer
    x = 141,780.75

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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.