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Finding the Fourth Proportional to 390,151.10, 585,226.65 and 203,138.30

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Solution

The fourth proportional to 390,151.10, 585,226.65 and 203,138.30 is: 304,707.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,151.10 : 585,226.65 = 203,138.30 : x
  2. Step 2: Convert to fraction form
    390,151.10/585,226.65 = 203,138.30/x
  3. Step 3: Cross multiply
    390,151.10x = 585,226.65 × 203,138.30
  4. Step 4: Simplify right side
    390,151.10x = 118,881,946,795.70
  5. Step 5: Solve for x
    x = 118,881,946,795.70/390,151.10
  6. Step 6: Final answer
    x = 304,707.45

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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.