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Finding the Fourth Proportional to 421,840.71, 582,411.87 and 376,440.62

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Solution

The fourth proportional to 421,840.71, 582,411.87 and 376,440.62 is: 519,730.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,840.71 : 582,411.87 = 376,440.62 : x
  2. Step 2: Convert to fraction form
    421,840.71/582,411.87 = 376,440.62/x
  3. Step 3: Cross multiply
    421,840.71x = 582,411.87 × 376,440.62
  4. Step 4: Simplify right side
    421,840.71x = 219,243,482,526.10
  5. Step 5: Solve for x
    x = 219,243,482,526.10/421,840.71
  6. Step 6: Final answer
    x = 519,730.50

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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.