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Finding the Fourth Proportional to 521,107.70, 781,661.55 and 403,009.70

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Solution

The fourth proportional to 521,107.70, 781,661.55 and 403,009.70 is: 604,514.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,107.70 : 781,661.55 = 403,009.70 : x
  2. Step 2: Convert to fraction form
    521,107.70/781,661.55 = 403,009.70/x
  3. Step 3: Cross multiply
    521,107.70x = 781,661.55 × 403,009.70
  4. Step 4: Simplify right side
    521,107.70x = 315,017,186,767.04
  5. Step 5: Solve for x
    x = 315,017,186,767.04/521,107.70
  6. Step 6: Final answer
    x = 604,514.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.