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Finding the Fourth Proportional to 718,102.84, 990,988.52 and 395,825.30

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Solution

The fourth proportional to 718,102.84, 990,988.52 and 395,825.30 is: 546,242.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,102.84 : 990,988.52 = 395,825.30 : x
  2. Step 2: Convert to fraction form
    718,102.84/990,988.52 = 395,825.30/x
  3. Step 3: Cross multiply
    718,102.84x = 990,988.52 × 395,825.30
  4. Step 4: Simplify right side
    718,102.84x = 392,258,328,225.56
  5. Step 5: Solve for x
    x = 392,258,328,225.56/718,102.84
  6. Step 6: Final answer
    x = 546,242.55

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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.