Home / 1,312,128.40-1,966,954.20-712,205.20

Finding the Fourth Proportional to 1,312,128.40, 1,966,954.20 and 712,205.20

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Solution

The fourth proportional to 1,312,128.40, 1,966,954.20 and 712,205.20 is: 1,067,635.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,128.40 : 1,966,954.20 = 712,205.20 : x
  2. Step 2: Convert to fraction form
    1,312,128.40/1,966,954.20 = 712,205.20/x
  3. Step 3: Cross multiply
    1,312,128.40x = 1,966,954.20 × 712,205.20
  4. Step 4: Simplify right side
    1,312,128.40x = 1,400,875,009,401.84
  5. Step 5: Solve for x
    x = 1,400,875,009,401.84/1,312,128.40
  6. Step 6: Final answer
    x = 1,067,635.61

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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.