Home / 1,211,139.40-1,815,153.90-929,259.40

Finding the Fourth Proportional to 1,211,139.40, 1,815,153.90 and 929,259.40

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Solution

The fourth proportional to 1,211,139.40, 1,815,153.90 and 929,259.40 is: 1,392,695.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,139.40 : 1,815,153.90 = 929,259.40 : x
  2. Step 2: Convert to fraction form
    1,211,139.40/1,815,153.90 = 929,259.40/x
  3. Step 3: Cross multiply
    1,211,139.40x = 1,815,153.90 × 929,259.40
  4. Step 4: Simplify right side
    1,211,139.40x = 1,686,748,824,021.66
  5. Step 5: Solve for x
    x = 1,686,748,824,021.66/1,211,139.40
  6. Step 6: Final answer
    x = 1,392,695.86

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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.