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Finding the Fourth Proportional to 999,632.81, 1,378,058.47 and 712,654.67

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Solution

The fourth proportional to 999,632.81, 1,378,058.47 and 712,654.67 is: 982,440.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,632.81 : 1,378,058.47 = 712,654.67 : x
  2. Step 2: Convert to fraction form
    999,632.81/1,378,058.47 = 712,654.67/x
  3. Step 3: Cross multiply
    999,632.81x = 1,378,058.47 × 712,654.67
  4. Step 4: Simplify right side
    999,632.81x = 982,079,805,842.07
  5. Step 5: Solve for x
    x = 982,079,805,842.07/999,632.81
  6. Step 6: Final answer
    x = 982,440.55

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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.