Home / 420,328.31-630,497.97-139,845.56

Finding the Fourth Proportional to 420,328.31, 630,497.97 and 139,845.56

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Solution

The fourth proportional to 420,328.31, 630,497.97 and 139,845.56 is: 209,770.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,328.31 : 630,497.97 = 139,845.56 : x
  2. Step 2: Convert to fraction form
    420,328.31/630,497.97 = 139,845.56/x
  3. Step 3: Cross multiply
    420,328.31x = 630,497.97 × 139,845.56
  4. Step 4: Simplify right side
    420,328.31x = 88,172,343,269.76
  5. Step 5: Solve for x
    x = 88,172,343,269.76/420,328.31
  6. Step 6: Final answer
    x = 209,770.17

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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.