Home / 687,671.10-948,938.55-381,723.42

Finding the Fourth Proportional to 687,671.10, 948,938.55 and 381,723.42

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Solution

The fourth proportional to 687,671.10, 948,938.55 and 381,723.42 is: 526,751.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,671.10 : 948,938.55 = 381,723.42 : x
  2. Step 2: Convert to fraction form
    687,671.10/948,938.55 = 381,723.42/x
  3. Step 3: Cross multiply
    687,671.10x = 948,938.55 × 381,723.42
  4. Step 4: Simplify right side
    687,671.10x = 362,232,068,675.84
  5. Step 5: Solve for x
    x = 362,232,068,675.84/687,671.10
  6. Step 6: Final answer
    x = 526,751.91

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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.