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Finding the Fourth Proportional to 661,718.40, 992,707.20 and 282,638.40

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Solution

The fourth proportional to 661,718.40, 992,707.20 and 282,638.40 is: 424,012.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,718.40 : 992,707.20 = 282,638.40 : x
  2. Step 2: Convert to fraction form
    661,718.40/992,707.20 = 282,638.40/x
  3. Step 3: Cross multiply
    661,718.40x = 992,707.20 × 282,638.40
  4. Step 4: Simplify right side
    661,718.40x = 280,577,174,676.48
  5. Step 5: Solve for x
    x = 280,577,174,676.48/661,718.40
  6. Step 6: Final answer
    x = 424,012.96

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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.