Home / 1,207,989.60-1,666,983.12-664,121.40

Finding the Fourth Proportional to 1,207,989.60, 1,666,983.12 and 664,121.40

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Solution

The fourth proportional to 1,207,989.60, 1,666,983.12 and 664,121.40 is: 916,464.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,989.60 : 1,666,983.12 = 664,121.40 : x
  2. Step 2: Convert to fraction form
    1,207,989.60/1,666,983.12 = 664,121.40/x
  3. Step 3: Cross multiply
    1,207,989.60x = 1,666,983.12 × 664,121.40
  4. Step 4: Simplify right side
    1,207,989.60x = 1,107,079,163,430.77
  5. Step 5: Solve for x
    x = 1,107,079,163,430.77/1,207,989.60
  6. Step 6: Final answer
    x = 916,464.15

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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.