Home / 687,457.52-948,805.44-400,977.68

Finding the Fourth Proportional to 687,457.52, 948,805.44 and 400,977.68

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Solution

The fourth proportional to 687,457.52, 948,805.44 and 400,977.68 is: 553,415.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,457.52 : 948,805.44 = 400,977.68 : x
  2. Step 2: Convert to fraction form
    687,457.52/948,805.44 = 400,977.68/x
  3. Step 3: Cross multiply
    687,457.52x = 948,805.44 × 400,977.68
  4. Step 4: Simplify right side
    687,457.52x = 380,449,799,358.55
  5. Step 5: Solve for x
    x = 380,449,799,358.55/687,457.52
  6. Step 6: Final answer
    x = 553,415.73

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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.