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Finding the Fourth Proportional to 400,007.40, 598,455.90 and 260,039.40

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Solution

The fourth proportional to 400,007.40, 598,455.90 and 260,039.40 is: 389,048.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,007.40 : 598,455.90 = 260,039.40 : x
  2. Step 2: Convert to fraction form
    400,007.40/598,455.90 = 260,039.40/x
  3. Step 3: Cross multiply
    400,007.40x = 598,455.90 × 260,039.40
  4. Step 4: Simplify right side
    400,007.40x = 155,622,113,162.46
  5. Step 5: Solve for x
    x = 155,622,113,162.46/400,007.40
  6. Step 6: Final answer
    x = 389,048.09

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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.