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Finding the Fourth Proportional to 354,509.71, 489,462.95 and 272,692.67

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Solution

The fourth proportional to 354,509.71, 489,462.95 and 272,692.67 is: 376,500.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,509.71 : 489,462.95 = 272,692.67 : x
  2. Step 2: Convert to fraction form
    354,509.71/489,462.95 = 272,692.67/x
  3. Step 3: Cross multiply
    354,509.71x = 489,462.95 × 272,692.67
  4. Step 4: Simplify right side
    354,509.71x = 133,472,956,935.99
  5. Step 5: Solve for x
    x = 133,472,956,935.99/354,509.71
  6. Step 6: Final answer
    x = 376,500.15

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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.