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Finding the Fourth Proportional to 388,181.04, 535,561.44 and 316,437.60

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Solution

The fourth proportional to 388,181.04, 535,561.44 and 316,437.60 is: 436,579.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,181.04 : 535,561.44 = 316,437.60 : x
  2. Step 2: Convert to fraction form
    388,181.04/535,561.44 = 316,437.60/x
  3. Step 3: Cross multiply
    388,181.04x = 535,561.44 × 316,437.60
  4. Step 4: Simplify right side
    388,181.04x = 169,471,776,726.14
  5. Step 5: Solve for x
    x = 169,471,776,726.14/388,181.04
  6. Step 6: Final answer
    x = 436,579.22

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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.