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Finding the Fourth Proportional to 305,225.40, 457,838.10 and 139,337.40

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Solution

The fourth proportional to 305,225.40, 457,838.10 and 139,337.40 is: 209,006.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,225.40 : 457,838.10 = 139,337.40 : x
  2. Step 2: Convert to fraction form
    305,225.40/457,838.10 = 139,337.40/x
  3. Step 3: Cross multiply
    305,225.40x = 457,838.10 × 139,337.40
  4. Step 4: Simplify right side
    305,225.40x = 63,793,970,474.94
  5. Step 5: Solve for x
    x = 63,793,970,474.94/305,225.40
  6. Step 6: Final answer
    x = 209,006.10

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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.