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Finding the Fourth Proportional to 644,854.16, 889,622.70 and 402,716.36

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Solution

The fourth proportional to 644,854.16, 889,622.70 and 402,716.36 is: 555,576.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,854.16 : 889,622.70 = 402,716.36 : x
  2. Step 2: Convert to fraction form
    644,854.16/889,622.70 = 402,716.36/x
  3. Step 3: Cross multiply
    644,854.16x = 889,622.70 × 402,716.36
  4. Step 4: Simplify right side
    644,854.16x = 358,265,615,517.37
  5. Step 5: Solve for x
    x = 358,265,615,517.37/644,854.16
  6. Step 6: Final answer
    x = 555,576.19

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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.