Home / 426,928.80-640,320.32-142,580

Finding the Fourth Proportional to 426,928.80, 640,320.32 and 142,580

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Solution

The fourth proportional to 426,928.80, 640,320.32 and 142,580 is: 213,845.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,928.80 : 640,320.32 = 142,580 : x
  2. Step 2: Convert to fraction form
    426,928.80/640,320.32 = 142,580/x
  3. Step 3: Cross multiply
    426,928.80x = 640,320.32 × 142,580
  4. Step 4: Simplify right side
    426,928.80x = 91,296,871,225.60
  5. Step 5: Solve for x
    x = 91,296,871,225.60/426,928.80
  6. Step 6: Final answer
    x = 213,845.66

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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.