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Finding the Fourth Proportional to 644,520.60, 889,439.40 and 358,033.32

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Solution

The fourth proportional to 644,520.60, 889,439.40 and 358,033.32 is: 494,086.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,520.60 : 889,439.40 = 358,033.32 : x
  2. Step 2: Convert to fraction form
    644,520.60/889,439.40 = 358,033.32/x
  3. Step 3: Cross multiply
    644,520.60x = 889,439.40 × 358,033.32
  4. Step 4: Simplify right side
    644,520.60x = 318,448,941,320.81
  5. Step 5: Solve for x
    x = 318,448,941,320.81/644,520.60
  6. Step 6: Final answer
    x = 494,086.52

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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.