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Finding the Fourth Proportional to 405,931.30, 607,730.55 and 363,940.90

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Solution

The fourth proportional to 405,931.30, 607,730.55 and 363,940.90 is: 544,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,931.30 : 607,730.55 = 363,940.90 : x
  2. Step 2: Convert to fraction form
    405,931.30/607,730.55 = 363,940.90/x
  3. Step 3: Cross multiply
    405,931.30x = 607,730.55 × 363,940.90
  4. Step 4: Simplify right side
    405,931.30x = 221,178,003,324.50
  5. Step 5: Solve for x
    x = 221,178,003,324.50/405,931.30
  6. Step 6: Final answer
    x = 544,865.60

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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.