Home / 421,404.48-631,811.02-155,130.85

Finding the Fourth Proportional to 421,404.48, 631,811.02 and 155,130.85

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Solution

The fourth proportional to 421,404.48, 631,811.02 and 155,130.85 is: 232,587.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,404.48 : 631,811.02 = 155,130.85 : x
  2. Step 2: Convert to fraction form
    421,404.48/631,811.02 = 155,130.85/x
  3. Step 3: Cross multiply
    421,404.48x = 631,811.02 × 155,130.85
  4. Step 4: Simplify right side
    421,404.48x = 98,013,380,571.97
  5. Step 5: Solve for x
    x = 98,013,380,571.97/421,404.48
  6. Step 6: Final answer
    x = 232,587.42

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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.