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Finding the Fourth Proportional to 347,276.70, 520,915.05 and 147,603.60

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Solution

The fourth proportional to 347,276.70, 520,915.05 and 147,603.60 is: 221,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,276.70 : 520,915.05 = 147,603.60 : x
  2. Step 2: Convert to fraction form
    347,276.70/520,915.05 = 147,603.60/x
  3. Step 3: Cross multiply
    347,276.70x = 520,915.05 × 147,603.60
  4. Step 4: Simplify right side
    347,276.70x = 76,888,936,674.18
  5. Step 5: Solve for x
    x = 76,888,936,674.18/347,276.70
  6. Step 6: Final answer
    x = 221,405.40

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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.