Home / 687,452.28-948,798.18-400,972.36

Finding the Fourth Proportional to 687,452.28, 948,798.18 and 400,972.36

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Solution

The fourth proportional to 687,452.28, 948,798.18 and 400,972.36 is: 553,408.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,452.28 : 948,798.18 = 400,972.36 : x
  2. Step 2: Convert to fraction form
    687,452.28/948,798.18 = 400,972.36/x
  3. Step 3: Cross multiply
    687,452.28x = 948,798.18 × 400,972.36
  4. Step 4: Simplify right side
    687,452.28x = 380,441,845,398.31
  5. Step 5: Solve for x
    x = 380,441,845,398.31/687,452.28
  6. Step 6: Final answer
    x = 553,408.37

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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.