Home / 687,056.58-948,090.15-396,679.68

Finding the Fourth Proportional to 687,056.58, 948,090.15 and 396,679.68

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Solution

The fourth proportional to 687,056.58, 948,090.15 and 396,679.68 is: 547,390.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,056.58 : 948,090.15 = 396,679.68 : x
  2. Step 2: Convert to fraction form
    687,056.58/948,090.15 = 396,679.68/x
  3. Step 3: Cross multiply
    687,056.58x = 948,090.15 × 396,679.68
  4. Step 4: Simplify right side
    687,056.58x = 376,088,097,313.15
  5. Step 5: Solve for x
    x = 376,088,097,313.15/687,056.58
  6. Step 6: Final answer
    x = 547,390.29

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Double scale
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Similar ratio
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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.