Home / 812,305.80-1,218,123.34-306,780.76

Finding the Fourth Proportional to 812,305.80, 1,218,123.34 and 306,780.76

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Solution

The fourth proportional to 812,305.80, 1,218,123.34 and 306,780.76 is: 460,044.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,305.80 : 1,218,123.34 = 306,780.76 : x
  2. Step 2: Convert to fraction form
    812,305.80/1,218,123.34 = 306,780.76/x
  3. Step 3: Cross multiply
    812,305.80x = 1,218,123.34 × 306,780.76
  4. Step 4: Simplify right side
    812,305.80x = 373,696,804,018.94
  5. Step 5: Solve for x
    x = 373,696,804,018.94/812,305.80
  6. Step 6: Final answer
    x = 460,044.49

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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.