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Finding the Fourth Proportional to 485,548.85, 670,344.83 and 431,684.86

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Solution

The fourth proportional to 485,548.85, 670,344.83 and 431,684.86 is: 595,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,548.85 : 670,344.83 = 431,684.86 : x
  2. Step 2: Convert to fraction form
    485,548.85/670,344.83 = 431,684.86/x
  3. Step 3: Cross multiply
    485,548.85x = 670,344.83 × 431,684.86
  4. Step 4: Simplify right side
    485,548.85x = 289,377,714,090.27
  5. Step 5: Solve for x
    x = 289,377,714,090.27/485,548.85
  6. Step 6: Final answer
    x = 595,980.64

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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.