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Finding the Fourth Proportional to 405,545.95, 607,043.44 and 278,442.37

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Solution

The fourth proportional to 405,545.95, 607,043.44 and 278,442.37 is: 416,787.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,545.95 : 607,043.44 = 278,442.37 : x
  2. Step 2: Convert to fraction form
    405,545.95/607,043.44 = 278,442.37/x
  3. Step 3: Cross multiply
    405,545.95x = 607,043.44 × 278,442.37
  4. Step 4: Simplify right side
    405,545.95x = 169,026,614,126.55
  5. Step 5: Solve for x
    x = 169,026,614,126.55/405,545.95
  6. Step 6: Final answer
    x = 416,787.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.