Home / 1,139,207.40-1,708,811.10-1,121,492.70

Finding the Fourth Proportional to 1,139,207.40, 1,708,811.10 and 1,121,492.70

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Solution

The fourth proportional to 1,139,207.40, 1,708,811.10 and 1,121,492.70 is: 1,682,239.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,207.40 : 1,708,811.10 = 1,121,492.70 : x
  2. Step 2: Convert to fraction form
    1,139,207.40/1,708,811.10 = 1,121,492.70/x
  3. Step 3: Cross multiply
    1,139,207.40x = 1,708,811.10 × 1,121,492.70
  4. Step 4: Simplify right side
    1,139,207.40x = 1,916,419,174,328.97
  5. Step 5: Solve for x
    x = 1,916,419,174,328.97/1,139,207.40
  6. Step 6: Final answer
    x = 1,682,239.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.