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Finding the Fourth Proportional to 280,670.56, 387,311.28 and 153,322.72

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Solution

The fourth proportional to 280,670.56, 387,311.28 and 153,322.72 is: 211,577.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,670.56 : 387,311.28 = 153,322.72 : x
  2. Step 2: Convert to fraction form
    280,670.56/387,311.28 = 153,322.72/x
  3. Step 3: Cross multiply
    280,670.56x = 387,311.28 × 153,322.72
  4. Step 4: Simplify right side
    280,670.56x = 59,383,618,936.28
  5. Step 5: Solve for x
    x = 59,383,618,936.28/280,670.56
  6. Step 6: Final answer
    x = 211,577.66

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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.