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Finding the Fourth Proportional to 508,865.36, 766,955.71 and 438,635.66

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Solution

The fourth proportional to 508,865.36, 766,955.71 and 438,635.66 is: 661,106.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,865.36 : 766,955.71 = 438,635.66 : x
  2. Step 2: Convert to fraction form
    508,865.36/766,955.71 = 438,635.66/x
  3. Step 3: Cross multiply
    508,865.36x = 766,955.71 × 438,635.66
  4. Step 4: Simplify right side
    508,865.36x = 336,414,124,046.62
  5. Step 5: Solve for x
    x = 336,414,124,046.62/508,865.36
  6. Step 6: Final answer
    x = 661,106.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.