Home / 457,654,543.60-686,481,815.40-420,031,145.20

Finding the Fourth Proportional to 457,654,543.60, 686,481,815.40 and 420,031,145.20

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Solution

The fourth proportional to 457,654,543.60, 686,481,815.40 and 420,031,145.20 is: 630,046,717.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,654,543.60 : 686,481,815.40 = 420,031,145.20 : x
  2. Step 2: Convert to fraction form
    457,654,543.60/686,481,815.40 = 420,031,145.20/x
  3. Step 3: Cross multiply
    457,654,543.60x = 686,481,815.40 × 420,031,145.20
  4. Step 4: Simplify right side
    457,654,543.60x = 288,343,743,081,436,992
  5. Step 5: Solve for x
    x = 288,343,743,081,436,992/457,654,543.60
  6. Step 6: Final answer
    x = 630,046,717.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.