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Finding the Fourth Proportional to 345,907.80, 518,861.70 and 121,521.60

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Solution

The fourth proportional to 345,907.80, 518,861.70 and 121,521.60 is: 182,282.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,907.80 : 518,861.70 = 121,521.60 : x
  2. Step 2: Convert to fraction form
    345,907.80/518,861.70 = 121,521.60/x
  3. Step 3: Cross multiply
    345,907.80x = 518,861.70 × 121,521.60
  4. Step 4: Simplify right side
    345,907.80x = 63,052,903,962.72
  5. Step 5: Solve for x
    x = 63,052,903,962.72/345,907.80
  6. Step 6: Final answer
    x = 182,282.40

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1.5x scale

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.