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Finding the Fourth Proportional to 345,490.50, 518,210.78 and 108,900.90

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Solution

The fourth proportional to 345,490.50, 518,210.78 and 108,900.90 is: 163,343.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,490.50 : 518,210.78 = 108,900.90 : x
  2. Step 2: Convert to fraction form
    345,490.50/518,210.78 = 108,900.90/x
  3. Step 3: Cross multiply
    345,490.50x = 518,210.78 × 108,900.90
  4. Step 4: Simplify right side
    345,490.50x = 56,433,618,012.90
  5. Step 5: Solve for x
    x = 56,433,618,012.90/345,490.50
  6. Step 6: Final answer
    x = 163,343.47

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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.