Home / 687,090.50-948,187.28-381,172.94

Finding the Fourth Proportional to 687,090.50, 948,187.28 and 381,172.94

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Solution

The fourth proportional to 687,090.50, 948,187.28 and 381,172.94 is: 526,019.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,090.50 : 948,187.28 = 381,172.94 : x
  2. Step 2: Convert to fraction form
    687,090.50/948,187.28 = 381,172.94/x
  3. Step 3: Cross multiply
    687,090.50x = 948,187.28 × 381,172.94
  4. Step 4: Simplify right side
    687,090.50x = 361,423,333,188.20
  5. Step 5: Solve for x
    x = 361,423,333,188.20/687,090.50
  6. Step 6: Final answer
    x = 526,019.98

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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.