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Finding the Fourth Proportional to 657,888.32, 907,602.80 and 386,039.36

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Solution

The fourth proportional to 657,888.32, 907,602.80 and 386,039.36 is: 532,568.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,888.32 : 907,602.80 = 386,039.36 : x
  2. Step 2: Convert to fraction form
    657,888.32/907,602.80 = 386,039.36/x
  3. Step 3: Cross multiply
    657,888.32x = 907,602.80 × 386,039.36
  4. Step 4: Simplify right side
    657,888.32x = 350,370,404,046.21
  5. Step 5: Solve for x
    x = 350,370,404,046.21/657,888.32
  6. Step 6: Final answer
    x = 532,568.21

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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.