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Finding the Fourth Proportional to 867,998.70, 1,301,998.05 and 779,643.90

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Solution

The fourth proportional to 867,998.70, 1,301,998.05 and 779,643.90 is: 1,169,465.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,998.70 : 1,301,998.05 = 779,643.90 : x
  2. Step 2: Convert to fraction form
    867,998.70/1,301,998.05 = 779,643.90/x
  3. Step 3: Cross multiply
    867,998.70x = 1,301,998.05 × 779,643.90
  4. Step 4: Simplify right side
    867,998.70x = 1,015,094,837,494.40
  5. Step 5: Solve for x
    x = 1,015,094,837,494.40/867,998.70
  6. Step 6: Final answer
    x = 1,169,465.85

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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.