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Finding the Fourth Proportional to 663,611.04, 915,803.28 and 361,810.08

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Solution

The fourth proportional to 663,611.04, 915,803.28 and 361,810.08 is: 499,308.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,611.04 : 915,803.28 = 361,810.08 : x
  2. Step 2: Convert to fraction form
    663,611.04/915,803.28 = 361,810.08/x
  3. Step 3: Cross multiply
    663,611.04x = 915,803.28 × 361,810.08
  4. Step 4: Simplify right side
    663,611.04x = 331,346,858,001.06
  5. Step 5: Solve for x
    x = 331,346,858,001.06/663,611.04
  6. Step 6: Final answer
    x = 499,308.84

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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.