Home / 287,579.70-431,369.55-265,928.40

Finding the Fourth Proportional to 287,579.70, 431,369.55 and 265,928.40

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Solution

The fourth proportional to 287,579.70, 431,369.55 and 265,928.40 is: 398,892.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,579.70 : 431,369.55 = 265,928.40 : x
  2. Step 2: Convert to fraction form
    287,579.70/431,369.55 = 265,928.40/x
  3. Step 3: Cross multiply
    287,579.70x = 431,369.55 × 265,928.40
  4. Step 4: Simplify right side
    287,579.70x = 114,713,414,240.22
  5. Step 5: Solve for x
    x = 114,713,414,240.22/287,579.70
  6. Step 6: Final answer
    x = 398,892.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.