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Finding the Fourth Proportional to 694,228.01, 958,123.35 and 388,321.38

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Solution

The fourth proportional to 694,228.01, 958,123.35 and 388,321.38 is: 535,933.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,228.01 : 958,123.35 = 388,321.38 : x
  2. Step 2: Convert to fraction form
    694,228.01/958,123.35 = 388,321.38/x
  3. Step 3: Cross multiply
    694,228.01x = 958,123.35 × 388,321.38
  4. Step 4: Simplify right side
    694,228.01x = 372,059,781,482.22
  5. Step 5: Solve for x
    x = 372,059,781,482.22/694,228.01
  6. Step 6: Final answer
    x = 535,933.12

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Double scale
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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.