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Finding the Fourth Proportional to 420,356.93, 579,940.98 and 323,590.38

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Solution

The fourth proportional to 420,356.93, 579,940.98 and 323,590.38 is: 446,438.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,356.93 : 579,940.98 = 323,590.38 : x
  2. Step 2: Convert to fraction form
    420,356.93/579,940.98 = 323,590.38/x
  3. Step 3: Cross multiply
    420,356.93x = 579,940.98 × 323,590.38
  4. Step 4: Simplify right side
    420,356.93x = 187,663,322,095.77
  5. Step 5: Solve for x
    x = 187,663,322,095.77/420,356.93
  6. Step 6: Final answer
    x = 446,438.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.