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Finding the Fourth Proportional to 486,870.85, 671,766.62 and 282,800.51

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Solution

The fourth proportional to 486,870.85, 671,766.62 and 282,800.51 is: 390,197.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,870.85 : 671,766.62 = 282,800.51 : x
  2. Step 2: Convert to fraction form
    486,870.85/671,766.62 = 282,800.51/x
  3. Step 3: Cross multiply
    486,870.85x = 671,766.62 × 282,800.51
  4. Step 4: Simplify right side
    486,870.85x = 189,975,942,736.98
  5. Step 5: Solve for x
    x = 189,975,942,736.98/486,870.85
  6. Step 6: Final answer
    x = 390,197.82

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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.