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Finding the Fourth Proportional to 280,216.87, 386,700.48 and 152,895.20

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Solution

The fourth proportional to 280,216.87, 386,700.48 and 152,895.20 is: 210,996.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,216.87 : 386,700.48 = 152,895.20 : x
  2. Step 2: Convert to fraction form
    280,216.87/386,700.48 = 152,895.20/x
  3. Step 3: Cross multiply
    280,216.87x = 386,700.48 × 152,895.20
  4. Step 4: Simplify right side
    280,216.87x = 59,124,645,296.19
  5. Step 5: Solve for x
    x = 59,124,645,296.19/280,216.87
  6. Step 6: Final answer
    x = 210,996.03

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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.