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Finding the Fourth Proportional to 387,955.08, 535,372.74 and 218,189.16

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Solution

The fourth proportional to 387,955.08, 535,372.74 and 218,189.16 is: 301,098.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,955.08 : 535,372.74 = 218,189.16 : x
  2. Step 2: Convert to fraction form
    387,955.08/535,372.74 = 218,189.16/x
  3. Step 3: Cross multiply
    387,955.08x = 535,372.74 × 218,189.16
  4. Step 4: Simplify right side
    387,955.08x = 116,812,528,427.50
  5. Step 5: Solve for x
    x = 116,812,528,427.50/387,955.08
  6. Step 6: Final answer
    x = 301,098.08

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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.