Home / 1,139,770.40-1,709,809.20-392,045.60

Finding the Fourth Proportional to 1,139,770.40, 1,709,809.20 and 392,045.60

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Solution

The fourth proportional to 1,139,770.40, 1,709,809.20 and 392,045.60 is: 588,121.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,770.40 : 1,709,809.20 = 392,045.60 : x
  2. Step 2: Convert to fraction form
    1,139,770.40/1,709,809.20 = 392,045.60/x
  3. Step 3: Cross multiply
    1,139,770.40x = 1,709,809.20 × 392,045.60
  4. Step 4: Simplify right side
    1,139,770.40x = 670,323,173,699.52
  5. Step 5: Solve for x
    x = 670,323,173,699.52/1,139,770.40
  6. Step 6: Final answer
    x = 588,121.23

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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.