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Finding the Fourth Proportional to 522,087.70, 783,131.55 and 515,089.30

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Solution

The fourth proportional to 522,087.70, 783,131.55 and 515,089.30 is: 772,633.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,087.70 : 783,131.55 = 515,089.30 : x
  2. Step 2: Convert to fraction form
    522,087.70/783,131.55 = 515,089.30/x
  3. Step 3: Cross multiply
    522,087.70x = 783,131.55 × 515,089.30
  4. Step 4: Simplify right side
    522,087.70x = 403,382,681,897.42
  5. Step 5: Solve for x
    x = 403,382,681,897.42/522,087.70
  6. Step 6: Final answer
    x = 772,633.95

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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.