Home / 1,139,725.60-1,572,327.12-686,759.20

Finding the Fourth Proportional to 1,139,725.60, 1,572,327.12 and 686,759.20

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Solution

The fourth proportional to 1,139,725.60, 1,572,327.12 and 686,759.20 is: 947,429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,725.60 : 1,572,327.12 = 686,759.20 : x
  2. Step 2: Convert to fraction form
    1,139,725.60/1,572,327.12 = 686,759.20/x
  3. Step 3: Cross multiply
    1,139,725.60x = 1,572,327.12 × 686,759.20
  4. Step 4: Simplify right side
    1,139,725.60x = 1,079,810,115,069.50
  5. Step 5: Solve for x
    x = 1,079,810,115,069.50/1,139,725.60
  6. Step 6: Final answer
    x = 947,429.90

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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.