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Finding the Fourth Proportional to 390,849.90, 585,880.16 and 188,148.30

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Solution

The fourth proportional to 390,849.90, 585,880.16 and 188,148.30 is: 282,032.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,849.90 : 585,880.16 = 188,148.30 : x
  2. Step 2: Convert to fraction form
    390,849.90/585,880.16 = 188,148.30/x
  3. Step 3: Cross multiply
    390,849.90x = 585,880.16 × 188,148.30
  4. Step 4: Simplify right side
    390,849.90x = 110,232,355,166.99
  5. Step 5: Solve for x
    x = 110,232,355,166.99/390,849.90
  6. Step 6: Final answer
    x = 282,032.45

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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.