Home / 999,868.59-1,378,383.35-712,890.45

Finding the Fourth Proportional to 999,868.59, 1,378,383.35 and 712,890.45

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Solution

The fourth proportional to 999,868.59, 1,378,383.35 and 712,890.45 is: 982,765.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,868.59 : 1,378,383.35 = 712,890.45 : x
  2. Step 2: Convert to fraction form
    999,868.59/1,378,383.35 = 712,890.45/x
  3. Step 3: Cross multiply
    999,868.59x = 1,378,383.35 × 712,890.45
  4. Step 4: Simplify right side
    999,868.59x = 982,636,323,089.56
  5. Step 5: Solve for x
    x = 982,636,323,089.56/999,868.59
  6. Step 6: Final answer
    x = 982,765.47

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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.