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Finding the Fourth Proportional to 387,808.56, 535,196.16 and 218,053.62

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Solution

The fourth proportional to 387,808.56, 535,196.16 and 218,053.62 is: 300,925.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,808.56 : 535,196.16 = 218,053.62 : x
  2. Step 2: Convert to fraction form
    387,808.56/535,196.16 = 218,053.62/x
  3. Step 3: Cross multiply
    387,808.56x = 535,196.16 × 218,053.62
  4. Step 4: Simplify right side
    387,808.56x = 116,701,460,098.10
  5. Step 5: Solve for x
    x = 116,701,460,098.10/387,808.56
  6. Step 6: Final answer
    x = 300,925.44

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1.5x scale

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.