Home / 1,288,656.78-1,778,288.79-772,695.45

Finding the Fourth Proportional to 1,288,656.78, 1,778,288.79 and 772,695.45

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Solution

The fourth proportional to 1,288,656.78, 1,778,288.79 and 772,695.45 is: 1,066,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,656.78 : 1,778,288.79 = 772,695.45 : x
  2. Step 2: Convert to fraction form
    1,288,656.78/1,778,288.79 = 772,695.45/x
  3. Step 3: Cross multiply
    1,288,656.78x = 1,778,288.79 × 772,695.45
  4. Step 4: Simplify right side
    1,288,656.78x = 1,374,075,656,819.01
  5. Step 5: Solve for x
    x = 1,374,075,656,819.01/1,288,656.78
  6. Step 6: Final answer
    x = 1,066,285.20

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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.