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Finding the Fourth Proportional to 580,012.40, 870,193.56 and 391,230.56

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Solution

The fourth proportional to 580,012.40, 870,193.56 and 391,230.56 is: 586,963.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,012.40 : 870,193.56 = 391,230.56 : x
  2. Step 2: Convert to fraction form
    580,012.40/870,193.56 = 391,230.56/x
  3. Step 3: Cross multiply
    580,012.40x = 870,193.56 × 391,230.56
  4. Step 4: Simplify right side
    580,012.40x = 340,446,313,787.19
  5. Step 5: Solve for x
    x = 340,446,313,787.19/580,012.40
  6. Step 6: Final answer
    x = 586,963.85

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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.