Home / 687,448.53-948,792.99-400,968.61

Finding the Fourth Proportional to 687,448.53, 948,792.99 and 400,968.61

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Solution

The fourth proportional to 687,448.53, 948,792.99 and 400,968.61 is: 553,403.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,448.53 : 948,792.99 = 400,968.61 : x
  2. Step 2: Convert to fraction form
    687,448.53/948,792.99 = 400,968.61/x
  3. Step 3: Cross multiply
    687,448.53x = 948,792.99 × 400,968.61
  4. Step 4: Simplify right side
    687,448.53x = 380,436,206,378.04
  5. Step 5: Solve for x
    x = 380,436,206,378.04/687,448.53
  6. Step 6: Final answer
    x = 553,403.19

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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.