Home / 287,719.36-431,845.23-145,664.45

Finding the Fourth Proportional to 287,719.36, 431,845.23 and 145,664.45

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Solution

The fourth proportional to 287,719.36, 431,845.23 and 145,664.45 is: 218,631.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,719.36 : 431,845.23 = 145,664.45 : x
  2. Step 2: Convert to fraction form
    287,719.36/431,845.23 = 145,664.45/x
  3. Step 3: Cross multiply
    287,719.36x = 431,845.23 × 145,664.45
  4. Step 4: Simplify right side
    287,719.36x = 62,904,497,373.27
  5. Step 5: Solve for x
    x = 62,904,497,373.27/287,719.36
  6. Step 6: Final answer
    x = 218,631.44

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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.