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Finding the Fourth Proportional to 268,418.80, 370,418.70 and 153,699.18

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Solution

The fourth proportional to 268,418.80, 370,418.70 and 153,699.18 is: 212,105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,418.80 : 370,418.70 = 153,699.18 : x
  2. Step 2: Convert to fraction form
    268,418.80/370,418.70 = 153,699.18/x
  3. Step 3: Cross multiply
    268,418.80x = 370,418.70 × 153,699.18
  4. Step 4: Simplify right side
    268,418.80x = 56,933,050,446.67
  5. Step 5: Solve for x
    x = 56,933,050,446.67/268,418.80
  6. Step 6: Final answer
    x = 212,105.30

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1.5x scale

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.