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Finding the Fourth Proportional to 390,912.56, 539,181.24 and 358,751.04

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Solution

The fourth proportional to 390,912.56, 539,181.24 and 358,751.04 is: 494,821.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,912.56 : 539,181.24 = 358,751.04 : x
  2. Step 2: Convert to fraction form
    390,912.56/539,181.24 = 358,751.04/x
  3. Step 3: Cross multiply
    390,912.56x = 539,181.24 × 358,751.04
  4. Step 4: Simplify right side
    390,912.56x = 193,431,830,598.49
  5. Step 5: Solve for x
    x = 193,431,830,598.49/390,912.56
  6. Step 6: Final answer
    x = 494,821.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.