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Finding the Fourth Proportional to 716,598.76, 988,876.63 and 389,913.11

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Solution

The fourth proportional to 716,598.76, 988,876.63 and 389,913.11 is: 538,063.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,598.76 : 988,876.63 = 389,913.11 : x
  2. Step 2: Convert to fraction form
    716,598.76/988,876.63 = 389,913.11/x
  3. Step 3: Cross multiply
    716,598.76x = 988,876.63 × 389,913.11
  4. Step 4: Simplify right side
    716,598.76x = 385,575,965,169.20
  5. Step 5: Solve for x
    x = 385,575,965,169.20/716,598.76
  6. Step 6: Final answer
    x = 538,063.96

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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.