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Finding the Fourth Proportional to 716,808.30, 989,195.52 and 390,122.52

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Solution

The fourth proportional to 716,808.30, 989,195.52 and 390,122.52 is: 538,369.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,808.30 : 989,195.52 = 390,122.52 : x
  2. Step 2: Convert to fraction form
    716,808.30/989,195.52 = 390,122.52/x
  3. Step 3: Cross multiply
    716,808.30x = 989,195.52 × 390,122.52
  4. Step 4: Simplify right side
    716,808.30x = 385,907,449,035.11
  5. Step 5: Solve for x
    x = 385,907,449,035.11/716,808.30
  6. Step 6: Final answer
    x = 538,369.11

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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.