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Finding the Fourth Proportional to 219,139.40, 328,838.70 and 144,475.40

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Solution

The fourth proportional to 219,139.40, 328,838.70 and 144,475.40 is: 216,798.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,139.40 : 328,838.70 = 144,475.40 : x
  2. Step 2: Convert to fraction form
    219,139.40/328,838.70 = 144,475.40/x
  3. Step 3: Cross multiply
    219,139.40x = 328,838.70 × 144,475.40
  4. Step 4: Simplify right side
    219,139.40x = 47,509,102,717.98
  5. Step 5: Solve for x
    x = 47,509,102,717.98/219,139.40
  6. Step 6: Final answer
    x = 216,798.54

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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.