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Finding the Fourth Proportional to 280,017.54, 386,422.65 and 152,690.40

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Solution

The fourth proportional to 280,017.54, 386,422.65 and 152,690.40 is: 210,711.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,017.54 : 386,422.65 = 152,690.40 : x
  2. Step 2: Convert to fraction form
    280,017.54/386,422.65 = 152,690.40/x
  3. Step 3: Cross multiply
    280,017.54x = 386,422.65 × 152,690.40
  4. Step 4: Simplify right side
    280,017.54x = 59,003,028,997.56
  5. Step 5: Solve for x
    x = 59,003,028,997.56/280,017.54
  6. Step 6: Final answer
    x = 210,711.90

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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.