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Finding the Fourth Proportional to 280,337.78, 386,860.02 and 153,015.50

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Solution

The fourth proportional to 280,337.78, 386,860.02 and 153,015.50 is: 211,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,337.78 : 386,860.02 = 153,015.50 : x
  2. Step 2: Convert to fraction form
    280,337.78/386,860.02 = 153,015.50/x
  3. Step 3: Cross multiply
    280,337.78x = 386,860.02 × 153,015.50
  4. Step 4: Simplify right side
    280,337.78x = 59,195,579,390.31
  5. Step 5: Solve for x
    x = 59,195,579,390.31/280,337.78
  6. Step 6: Final answer
    x = 211,158.05

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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.