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Finding the Fourth Proportional to 485,575.86, 670,223.92 and 286,839.18

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Solution

The fourth proportional to 485,575.86, 670,223.92 and 286,839.18 is: 395,914.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,575.86 : 670,223.92 = 286,839.18 : x
  2. Step 2: Convert to fraction form
    485,575.86/670,223.92 = 286,839.18/x
  3. Step 3: Cross multiply
    485,575.86x = 670,223.92 × 286,839.18
  4. Step 4: Simplify right side
    485,575.86x = 192,246,479,629.19
  5. Step 5: Solve for x
    x = 192,246,479,629.19/485,575.86
  6. Step 6: Final answer
    x = 395,914.41

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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.