Home / 420,110,111.70-630,165,167.55-378,498,281.40

Finding the Fourth Proportional to 420,110,111.70, 630,165,167.55 and 378,498,281.40

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Solution

The fourth proportional to 420,110,111.70, 630,165,167.55 and 378,498,281.40 is: 567,747,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,110,111.70 : 630,165,167.55 = 378,498,281.40 : x
  2. Step 2: Convert to fraction form
    420,110,111.70/630,165,167.55 = 378,498,281.40/x
  3. Step 3: Cross multiply
    420,110,111.70x = 630,165,167.55 × 378,498,281.40
  4. Step 4: Simplify right side
    420,110,111.70x = 238,516,432,915,818,016
  5. Step 5: Solve for x
    x = 238,516,432,915,818,016/420,110,111.70
  6. Step 6: Final answer
    x = 567,747,422.10

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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.