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Finding the Fourth Proportional to 718,052.84, 990,907.95 and 395,763.11

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Solution

The fourth proportional to 718,052.84, 990,907.95 and 395,763.11 is: 546,150.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,052.84 : 990,907.95 = 395,763.11 : x
  2. Step 2: Convert to fraction form
    718,052.84/990,907.95 = 395,763.11/x
  3. Step 3: Cross multiply
    718,052.84x = 990,907.95 × 395,763.11
  4. Step 4: Simplify right side
    718,052.84x = 392,164,805,082.37
  5. Step 5: Solve for x
    x = 392,164,805,082.37/718,052.84
  6. Step 6: Final answer
    x = 546,150.35

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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.