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Finding the Fourth Proportional to 663,261.24, 915,300.54 and 361,455

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Solution

The fourth proportional to 663,261.24, 915,300.54 and 361,455 is: 498,807.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,261.24 : 915,300.54 = 361,455 : x
  2. Step 2: Convert to fraction form
    663,261.24/915,300.54 = 361,455/x
  3. Step 3: Cross multiply
    663,261.24x = 915,300.54 × 361,455
  4. Step 4: Simplify right side
    663,261.24x = 330,839,956,685.70
  5. Step 5: Solve for x
    x = 330,839,956,685.70/663,261.24
  6. Step 6: Final answer
    x = 498,807.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.