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Finding the Fourth Proportional to 716,641.58, 988,952.86 and 389,943.56

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Solution

The fourth proportional to 716,641.58, 988,952.86 and 389,943.56 is: 538,115.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,641.58 : 988,952.86 = 389,943.56 : x
  2. Step 2: Convert to fraction form
    716,641.58/988,952.86 = 389,943.56/x
  3. Step 3: Cross multiply
    716,641.58x = 988,952.86 × 389,943.56
  4. Step 4: Simplify right side
    716,641.58x = 385,635,803,254.81
  5. Step 5: Solve for x
    x = 385,635,803,254.81/716,641.58
  6. Step 6: Final answer
    x = 538,115.31

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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.