Home / 420,590.81-580,417.75-229,606.18

Finding the Fourth Proportional to 420,590.81, 580,417.75 and 229,606.18

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Solution

The fourth proportional to 420,590.81, 580,417.75 and 229,606.18 is: 316,857.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,590.81 : 580,417.75 = 229,606.18 : x
  2. Step 2: Convert to fraction form
    420,590.81/580,417.75 = 229,606.18/x
  3. Step 3: Cross multiply
    420,590.81x = 580,417.75 × 229,606.18
  4. Step 4: Simplify right side
    420,590.81x = 133,267,501,217.66
  5. Step 5: Solve for x
    x = 133,267,501,217.66/420,590.81
  6. Step 6: Final answer
    x = 316,857.85

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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.