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Finding the Fourth Proportional to 287,956.80, 431,384.40 and 154,792.80

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Solution

The fourth proportional to 287,956.80, 431,384.40 and 154,792.80 is: 231,893.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,956.80 : 431,384.40 = 154,792.80 : x
  2. Step 2: Convert to fraction form
    287,956.80/431,384.40 = 154,792.80/x
  3. Step 3: Cross multiply
    287,956.80x = 431,384.40 × 154,792.80
  4. Step 4: Simplify right side
    287,956.80x = 66,775,199,152.32
  5. Step 5: Solve for x
    x = 66,775,199,152.32/287,956.80
  6. Step 6: Final answer
    x = 231,893.11

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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.