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Finding the Fourth Proportional to 557,067.70, 835,601.55 and 521,638.30

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Solution

The fourth proportional to 557,067.70, 835,601.55 and 521,638.30 is: 782,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,067.70 : 835,601.55 = 521,638.30 : x
  2. Step 2: Convert to fraction form
    557,067.70/835,601.55 = 521,638.30/x
  3. Step 3: Cross multiply
    557,067.70x = 835,601.55 × 521,638.30
  4. Step 4: Simplify right side
    557,067.70x = 435,881,772,019.37
  5. Step 5: Solve for x
    x = 435,881,772,019.37/557,067.70
  6. Step 6: Final answer
    x = 782,457.45

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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.