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Finding the Fourth Proportional to 644,639.64, 889,875.48 and 435,132.96

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Solution

The fourth proportional to 644,639.64, 889,875.48 and 435,132.96 is: 600,667.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,639.64 : 889,875.48 = 435,132.96 : x
  2. Step 2: Convert to fraction form
    644,639.64/889,875.48 = 435,132.96/x
  3. Step 3: Cross multiply
    644,639.64x = 889,875.48 × 435,132.96
  4. Step 4: Simplify right side
    644,639.64x = 387,214,151,643.82
  5. Step 5: Solve for x
    x = 387,214,151,643.82/644,639.64
  6. Step 6: Final answer
    x = 600,667.61

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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.