Home / 657,914.40-987,332.40-421,831.20

Finding the Fourth Proportional to 657,914.40, 987,332.40 and 421,831.20

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Solution

The fourth proportional to 657,914.40, 987,332.40 and 421,831.20 is: 633,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,914.40 : 987,332.40 = 421,831.20 : x
  2. Step 2: Convert to fraction form
    657,914.40/987,332.40 = 421,831.20/x
  3. Step 3: Cross multiply
    657,914.40x = 987,332.40 × 421,831.20
  4. Step 4: Simplify right side
    657,914.40x = 416,487,611,090.88
  5. Step 5: Solve for x
    x = 416,487,611,090.88/657,914.40
  6. Step 6: Final answer
    x = 633,042.25

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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.