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Finding the Fourth Proportional to 689,950.05, 952,129.62 and 388,144.05

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Solution

The fourth proportional to 689,950.05, 952,129.62 and 388,144.05 is: 535,637.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,950.05 : 952,129.62 = 388,144.05 : x
  2. Step 2: Convert to fraction form
    689,950.05/952,129.62 = 388,144.05/x
  3. Step 3: Cross multiply
    689,950.05x = 952,129.62 × 388,144.05
  4. Step 4: Simplify right side
    689,950.05x = 369,563,446,831.76
  5. Step 5: Solve for x
    x = 369,563,446,831.76/689,950.05
  6. Step 6: Final answer
    x = 535,637.97

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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.