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Finding the Fourth Proportional to 561,990.72, 775,531.47 and 307,336.44

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Solution

The fourth proportional to 561,990.72, 775,531.47 and 307,336.44 is: 424,115.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,990.72 : 775,531.47 = 307,336.44 : x
  2. Step 2: Convert to fraction form
    561,990.72/775,531.47 = 307,336.44/x
  3. Step 3: Cross multiply
    561,990.72x = 775,531.47 × 307,336.44
  4. Step 4: Simplify right side
    561,990.72x = 238,349,081,097.77
  5. Step 5: Solve for x
    x = 238,349,081,097.77/561,990.72
  6. Step 6: Final answer
    x = 424,115.69

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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.