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Finding the Fourth Proportional to 388,159.60, 535,622.16 and 218,390.08

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Solution

The fourth proportional to 388,159.60, 535,622.16 and 218,390.08 is: 301,356.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,159.60 : 535,622.16 = 218,390.08 : x
  2. Step 2: Convert to fraction form
    388,159.60/535,622.16 = 218,390.08/x
  3. Step 3: Cross multiply
    388,159.60x = 535,622.16 × 218,390.08
  4. Step 4: Simplify right side
    388,159.60x = 116,974,566,372.17
  5. Step 5: Solve for x
    x = 116,974,566,372.17/388,159.60
  6. Step 6: Final answer
    x = 301,356.88

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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.