Home / 1,289,980.64-1,780,127.88-709,199.54

Finding the Fourth Proportional to 1,289,980.64, 1,780,127.88 and 709,199.54

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Solution

The fourth proportional to 1,289,980.64, 1,780,127.88 and 709,199.54 is: 978,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,980.64 : 1,780,127.88 = 709,199.54 : x
  2. Step 2: Convert to fraction form
    1,289,980.64/1,780,127.88 = 709,199.54/x
  3. Step 3: Cross multiply
    1,289,980.64x = 1,780,127.88 × 709,199.54
  4. Step 4: Simplify right side
    1,289,980.64x = 1,262,465,873,637.18
  5. Step 5: Solve for x
    x = 1,262,465,873,637.18/1,289,980.64
  6. Step 6: Final answer
    x = 978,670.40

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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.