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Finding the Fourth Proportional to 355,411.50, 533,210.62 and 127,730.11

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Solution

The fourth proportional to 355,411.50, 533,210.62 and 127,730.11 is: 191,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,411.50 : 533,210.62 = 127,730.11 : x
  2. Step 2: Convert to fraction form
    355,411.50/533,210.62 = 127,730.11/x
  3. Step 3: Cross multiply
    355,411.50x = 533,210.62 × 127,730.11
  4. Step 4: Simplify right side
    355,411.50x = 68,107,051,145.77
  5. Step 5: Solve for x
    x = 68,107,051,145.77/355,411.50
  6. Step 6: Final answer
    x = 191,628.72

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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.