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Finding the Fourth Proportional to 1,260,447.86, 1,739,565.11 and 716,665.13

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Solution

The fourth proportional to 1,260,447.86, 1,739,565.11 and 716,665.13 is: 989,081.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,447.86 : 1,739,565.11 = 716,665.13 : x
  2. Step 2: Convert to fraction form
    1,260,447.86/1,739,565.11 = 716,665.13/x
  3. Step 3: Cross multiply
    1,260,447.86x = 1,739,565.11 × 716,665.13
  4. Step 4: Simplify right side
    1,260,447.86x = 1,246,685,643,420.46
  5. Step 5: Solve for x
    x = 1,246,685,643,420.46/1,260,447.86
  6. Step 6: Final answer
    x = 989,081.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.