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Finding the Fourth Proportional to 345,645.20, 518,467.80 and 109,060.40

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Solution

The fourth proportional to 345,645.20, 518,467.80 and 109,060.40 is: 163,590.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,645.20 : 518,467.80 = 109,060.40 : x
  2. Step 2: Convert to fraction form
    345,645.20/518,467.80 = 109,060.40/x
  3. Step 3: Cross multiply
    345,645.20x = 518,467.80 × 109,060.40
  4. Step 4: Simplify right side
    345,645.20x = 56,544,305,655.12
  5. Step 5: Solve for x
    x = 56,544,305,655.12/345,645.20
  6. Step 6: Final answer
    x = 163,590.60

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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.