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Finding the Fourth Proportional to 280,343.30, 386,867.59 and 153,021.02

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Solution

The fourth proportional to 280,343.30, 386,867.59 and 153,021.02 is: 211,165.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,343.30 : 386,867.59 = 153,021.02 : x
  2. Step 2: Convert to fraction form
    280,343.30/386,867.59 = 153,021.02/x
  3. Step 3: Cross multiply
    280,343.30x = 386,867.59 × 153,021.02
  4. Step 4: Simplify right side
    280,343.30x = 59,198,873,226.74
  5. Step 5: Solve for x
    x = 59,198,873,226.74/280,343.30
  6. Step 6: Final answer
    x = 211,165.64

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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.