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Finding the Fourth Proportional to 287,585.20, 431,377.80 and 264,840.40

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Solution

The fourth proportional to 287,585.20, 431,377.80 and 264,840.40 is: 397,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,585.20 : 431,377.80 = 264,840.40 : x
  2. Step 2: Convert to fraction form
    287,585.20/431,377.80 = 264,840.40/x
  3. Step 3: Cross multiply
    287,585.20x = 431,377.80 × 264,840.40
  4. Step 4: Simplify right side
    287,585.20x = 114,246,269,103.12
  5. Step 5: Solve for x
    x = 114,246,269,103.12/287,585.20
  6. Step 6: Final answer
    x = 397,260.60

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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.