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Finding the Fourth Proportional to 257,871.40, 386,807.10 and 173,890.60

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Solution

The fourth proportional to 257,871.40, 386,807.10 and 173,890.60 is: 260,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,871.40 : 386,807.10 = 173,890.60 : x
  2. Step 2: Convert to fraction form
    257,871.40/386,807.10 = 173,890.60/x
  3. Step 3: Cross multiply
    257,871.40x = 386,807.10 × 173,890.60
  4. Step 4: Simplify right side
    257,871.40x = 67,262,118,703.26
  5. Step 5: Solve for x
    x = 67,262,118,703.26/257,871.40
  6. Step 6: Final answer
    x = 260,835.90

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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.