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Finding the Fourth Proportional to 687,448.79, 948,793.34 and 400,968.86

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Solution

The fourth proportional to 687,448.79, 948,793.34 and 400,968.86 is: 553,403.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,448.79 : 948,793.34 = 400,968.86 : x
  2. Step 2: Convert to fraction form
    687,448.79/948,793.34 = 400,968.86/x
  3. Step 3: Cross multiply
    687,448.79x = 948,793.34 × 400,968.86
  4. Step 4: Simplify right side
    687,448.79x = 380,436,577,166.58
  5. Step 5: Solve for x
    x = 380,436,577,166.58/687,448.79
  6. Step 6: Final answer
    x = 553,403.52

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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.