Home / 1,288,651.53-1,778,281.54-772,690.21

Finding the Fourth Proportional to 1,288,651.53, 1,778,281.54 and 772,690.21

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Solution

The fourth proportional to 1,288,651.53, 1,778,281.54 and 772,690.21 is: 1,066,277.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,651.53 : 1,778,281.54 = 772,690.21 : x
  2. Step 2: Convert to fraction form
    1,288,651.53/1,778,281.54 = 772,690.21/x
  3. Step 3: Cross multiply
    1,288,651.53x = 1,778,281.54 × 772,690.21
  4. Step 4: Simplify right side
    1,288,651.53x = 1,374,060,739,552.09
  5. Step 5: Solve for x
    x = 1,374,060,739,552.09/1,288,651.53
  6. Step 6: Final answer
    x = 1,066,277.97

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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.