Home / 743,118.09-1,025,566.20-420,885.51

Finding the Fourth Proportional to 743,118.09, 1,025,566.20 and 420,885.51

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Solution

The fourth proportional to 743,118.09, 1,025,566.20 and 420,885.51 is: 580,857.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,118.09 : 1,025,566.20 = 420,885.51 : x
  2. Step 2: Convert to fraction form
    743,118.09/1,025,566.20 = 420,885.51/x
  3. Step 3: Cross multiply
    743,118.09x = 1,025,566.20 × 420,885.51
  4. Step 4: Simplify right side
    743,118.09x = 431,645,953,125.76
  5. Step 5: Solve for x
    x = 431,645,953,125.76/743,118.09
  6. Step 6: Final answer
    x = 580,857.82

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Double scale
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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.