Home / 420,320,556.17-630,557,228.95-210,340,909.76

Finding the Fourth Proportional to 420,320,556.17, 630,557,228.95 and 210,340,909.76

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Solution

The fourth proportional to 420,320,556.17, 630,557,228.95 and 210,340,909.76 is: 315,549,594.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,320,556.17 : 630,557,228.95 = 210,340,909.76 : x
  2. Step 2: Convert to fraction form
    420,320,556.17/630,557,228.95 = 210,340,909.76/x
  3. Step 3: Cross multiply
    420,320,556.17x = 630,557,228.95 × 210,340,909.76
  4. Step 4: Simplify right side
    420,320,556.17x = 132,631,981,189,408,960
  5. Step 5: Solve for x
    x = 132,631,981,189,408,960/420,320,556.17
  6. Step 6: Final answer
    x = 315,549,594.81

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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.