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Finding the Fourth Proportional to 280,671.17, 387,325.55 and 153,347.67

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Solution

The fourth proportional to 280,671.17, 387,325.55 and 153,347.67 is: 211,619.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,671.17 : 387,325.55 = 153,347.67 : x
  2. Step 2: Convert to fraction form
    280,671.17/387,325.55 = 153,347.67/x
  3. Step 3: Cross multiply
    280,671.17x = 387,325.55 × 153,347.67
  4. Step 4: Simplify right side
    280,671.17x = 59,395,469,857.23
  5. Step 5: Solve for x
    x = 59,395,469,857.23/280,671.17
  6. Step 6: Final answer
    x = 211,619.42

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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.