Home / 687,819.90-949,304.40-401,339.28

Finding the Fourth Proportional to 687,819.90, 949,304.40 and 401,339.28

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Solution

The fourth proportional to 687,819.90, 949,304.40 and 401,339.28 is: 553,914.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,819.90 : 949,304.40 = 401,339.28 : x
  2. Step 2: Convert to fraction form
    687,819.90/949,304.40 = 401,339.28/x
  3. Step 3: Cross multiply
    687,819.90x = 949,304.40 × 401,339.28
  4. Step 4: Simplify right side
    687,819.90x = 380,993,144,396.83
  5. Step 5: Solve for x
    x = 380,993,144,396.83/687,819.90
  6. Step 6: Final answer
    x = 553,914.11

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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.