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Finding the Fourth Proportional to 687,871.45, 949,262.58 and 386,065.45

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Solution

The fourth proportional to 687,871.45, 949,262.58 and 386,065.45 is: 532,770.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,871.45 : 949,262.58 = 386,065.45 : x
  2. Step 2: Convert to fraction form
    687,871.45/949,262.58 = 386,065.45/x
  3. Step 3: Cross multiply
    687,871.45x = 949,262.58 × 386,065.45
  4. Step 4: Simplify right side
    687,871.45x = 366,477,480,369.55
  5. Step 5: Solve for x
    x = 366,477,480,369.55/687,871.45
  6. Step 6: Final answer
    x = 532,770.31

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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.