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Finding the Fourth Proportional to 1,282,739.93, 1,769,899.92 and 766,416.25

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Solution

The fourth proportional to 1,282,739.93, 1,769,899.92 and 766,416.25 is: 1,057,486.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282,739.93 : 1,769,899.92 = 766,416.25 : x
  2. Step 2: Convert to fraction form
    1,282,739.93/1,769,899.92 = 766,416.25/x
  3. Step 3: Cross multiply
    1,282,739.93x = 1,769,899.92 × 766,416.25
  4. Step 4: Simplify right side
    1,282,739.93x = 1,356,480,050,712.20
  5. Step 5: Solve for x
    x = 1,356,480,050,712.20/1,282,739.93
  6. Step 6: Final answer
    x = 1,057,486.42

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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.