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Finding the Fourth Proportional to 280,630.16, 421,111.31 and 103,261.71

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Solution

The fourth proportional to 280,630.16, 421,111.31 and 103,261.71 is: 154,953.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,630.16 : 421,111.31 = 103,261.71 : x
  2. Step 2: Convert to fraction form
    280,630.16/421,111.31 = 103,261.71/x
  3. Step 3: Cross multiply
    280,630.16x = 421,111.31 × 103,261.71
  4. Step 4: Simplify right side
    280,630.16x = 43,484,673,454.63
  5. Step 5: Solve for x
    x = 43,484,673,454.63/280,630.16
  6. Step 6: Final answer
    x = 154,953.67

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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.