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Finding the Fourth Proportional to 318,714.70, 446,987.90 and 318,714.70

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Solution

The fourth proportional to 318,714.70, 446,987.90 and 318,714.70 is: 446,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,714.70 : 446,987.90 = 318,714.70 : x
  2. Step 2: Convert to fraction form
    318,714.70/446,987.90 = 318,714.70/x
  3. Step 3: Cross multiply
    318,714.70x = 446,987.90 × 318,714.70
  4. Step 4: Simplify right side
    318,714.70x = 142,461,614,452.13
  5. Step 5: Solve for x
    x = 142,461,614,452.13/318,714.70
  6. Step 6: Final answer
    x = 446,987.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.