Home / 1,298,210.72-1,947,500.40-399,727.12

Finding the Fourth Proportional to 1,298,210.72, 1,947,500.40 and 399,727.12

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Solution

The fourth proportional to 1,298,210.72, 1,947,500.40 and 399,727.12 is: 599,647.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,210.72 : 1,947,500.40 = 399,727.12 : x
  2. Step 2: Convert to fraction form
    1,298,210.72/1,947,500.40 = 399,727.12/x
  3. Step 3: Cross multiply
    1,298,210.72x = 1,947,500.40 × 399,727.12
  4. Step 4: Simplify right side
    1,298,210.72x = 778,468,726,090.85
  5. Step 5: Solve for x
    x = 778,468,726,090.85/1,298,210.72
  6. Step 6: Final answer
    x = 599,647.43

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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.