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Finding the Fourth Proportional to 287,389.44, 431,084.16 and 87,710.87

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Solution

The fourth proportional to 287,389.44, 431,084.16 and 87,710.87 is: 131,566.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,389.44 : 431,084.16 = 87,710.87 : x
  2. Step 2: Convert to fraction form
    287,389.44/431,084.16 = 87,710.87/x
  3. Step 3: Cross multiply
    287,389.44x = 431,084.16 × 87,710.87
  4. Step 4: Simplify right side
    287,389.44x = 37,810,767,794.53
  5. Step 5: Solve for x
    x = 37,810,767,794.53/287,389.44
  6. Step 6: Final answer
    x = 131,566.31

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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.