Home / 687,139.51-948,258.25-381,235.96

Finding the Fourth Proportional to 687,139.51, 948,258.25 and 381,235.96

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Solution

The fourth proportional to 687,139.51, 948,258.25 and 381,235.96 is: 526,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,139.51 : 948,258.25 = 381,235.96 : x
  2. Step 2: Convert to fraction form
    687,139.51/948,258.25 = 381,235.96/x
  3. Step 3: Cross multiply
    687,139.51x = 948,258.25 × 381,235.96
  4. Step 4: Simplify right side
    687,139.51x = 361,510,144,266.67
  5. Step 5: Solve for x
    x = 361,510,144,266.67/687,139.51
  6. Step 6: Final answer
    x = 526,108.80

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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.