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Finding the Fourth Proportional to 305,226.18, 421,212.15 and 169,280.91

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Solution

The fourth proportional to 305,226.18, 421,212.15 and 169,280.91 is: 233,607.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,226.18 : 421,212.15 = 169,280.91 : x
  2. Step 2: Convert to fraction form
    305,226.18/421,212.15 = 169,280.91/x
  3. Step 3: Cross multiply
    305,226.18x = 421,212.15 × 169,280.91
  4. Step 4: Simplify right side
    305,226.18x = 71,303,176,055.06
  5. Step 5: Solve for x
    x = 71,303,176,055.06/305,226.18
  6. Step 6: Final answer
    x = 233,607.67

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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.