Home / 420,321.24-630,666.68-220,594.82

Finding the Fourth Proportional to 420,321.24, 630,666.68 and 220,594.82

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Solution

The fourth proportional to 420,321.24, 630,666.68 and 220,594.82 is: 330,989.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,321.24 : 630,666.68 = 220,594.82 : x
  2. Step 2: Convert to fraction form
    420,321.24/630,666.68 = 220,594.82/x
  3. Step 3: Cross multiply
    420,321.24x = 630,666.68 × 220,594.82
  4. Step 4: Simplify right side
    420,321.24x = 139,121,798,498.29
  5. Step 5: Solve for x
    x = 139,121,798,498.29/420,321.24
  6. Step 6: Final answer
    x = 330,989.22

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1.5x scale

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.