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Finding the Fourth Proportional to 630,374.66, 869,912.97 and 358,442.61

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Solution

The fourth proportional to 630,374.66, 869,912.97 and 358,442.61 is: 494,648.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,374.66 : 869,912.97 = 358,442.61 : x
  2. Step 2: Convert to fraction form
    630,374.66/869,912.97 = 358,442.61/x
  3. Step 3: Cross multiply
    630,374.66x = 869,912.97 × 358,442.61
  4. Step 4: Simplify right side
    630,374.66x = 311,813,875,439.65
  5. Step 5: Solve for x
    x = 311,813,875,439.65/630,374.66
  6. Step 6: Final answer
    x = 494,648.50

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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.