Home / 687,018.90-948,101.30-381,085.34

Finding the Fourth Proportional to 687,018.90, 948,101.30 and 381,085.34

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Solution

The fourth proportional to 687,018.90, 948,101.30 and 381,085.34 is: 525,906.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,018.90 : 948,101.30 = 381,085.34 : x
  2. Step 2: Convert to fraction form
    687,018.90/948,101.30 = 381,085.34/x
  3. Step 3: Cross multiply
    687,018.90x = 948,101.30 × 381,085.34
  4. Step 4: Simplify right side
    687,018.90x = 361,307,499,619.01
  5. Step 5: Solve for x
    x = 361,307,499,619.01/687,018.90
  6. Step 6: Final answer
    x = 525,906.20

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1.5x scale

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.