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Finding the Fourth Proportional to 611,000.76, 843,142.92 and 369,140.40

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Solution

The fourth proportional to 611,000.76, 843,142.92 and 369,140.40 is: 509,390.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,000.76 : 843,142.92 = 369,140.40 : x
  2. Step 2: Convert to fraction form
    611,000.76/843,142.92 = 369,140.40/x
  3. Step 3: Cross multiply
    611,000.76x = 843,142.92 × 369,140.40
  4. Step 4: Simplify right side
    611,000.76x = 311,238,114,745.97
  5. Step 5: Solve for x
    x = 311,238,114,745.97/611,000.76
  6. Step 6: Final answer
    x = 509,390.72

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1.5x scale

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.