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Finding the Fourth Proportional to 660,225, 911,121.54 and 358,419

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Solution

The fourth proportional to 660,225, 911,121.54 and 358,419 is: 494,624.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,225 : 911,121.54 = 358,419 : x
  2. Step 2: Convert to fraction form
    660,225/911,121.54 = 358,419/x
  3. Step 3: Cross multiply
    660,225x = 911,121.54 × 358,419
  4. Step 4: Simplify right side
    660,225x = 326,563,271,245.26
  5. Step 5: Solve for x
    x = 326,563,271,245.26/660,225
  6. Step 6: Final answer
    x = 494,624.21

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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.