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Finding the Fourth Proportional to 389,490.50, 537,496.90 and 276,510.08

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Solution

The fourth proportional to 389,490.50, 537,496.90 and 276,510.08 is: 381,583.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,490.50 : 537,496.90 = 276,510.08 : x
  2. Step 2: Convert to fraction form
    389,490.50/537,496.90 = 276,510.08/x
  3. Step 3: Cross multiply
    389,490.50x = 537,496.90 × 276,510.08
  4. Step 4: Simplify right side
    389,490.50x = 148,623,310,818.75
  5. Step 5: Solve for x
    x = 148,623,310,818.75/389,490.50
  6. Step 6: Final answer
    x = 381,583.92

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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.