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Finding the Fourth Proportional to 813,998.70, 1,220,998.05 and 779,444.10

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Solution

The fourth proportional to 813,998.70, 1,220,998.05 and 779,444.10 is: 1,169,166.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,998.70 : 1,220,998.05 = 779,444.10 : x
  2. Step 2: Convert to fraction form
    813,998.70/1,220,998.05 = 779,444.10/x
  3. Step 3: Cross multiply
    813,998.70x = 1,220,998.05 × 779,444.10
  4. Step 4: Simplify right side
    813,998.70x = 951,699,726,184.01
  5. Step 5: Solve for x
    x = 951,699,726,184.01/813,998.70
  6. Step 6: Final answer
    x = 1,169,166.15

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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.