Home / 658,020.60-987,030.90-421,824.60

Finding the Fourth Proportional to 658,020.60, 987,030.90 and 421,824.60

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Solution

The fourth proportional to 658,020.60, 987,030.90 and 421,824.60 is: 632,736.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,020.60 : 987,030.90 = 421,824.60 : x
  2. Step 2: Convert to fraction form
    658,020.60/987,030.90 = 421,824.60/x
  3. Step 3: Cross multiply
    658,020.60x = 987,030.90 × 421,824.60
  4. Step 4: Simplify right side
    658,020.60x = 416,353,914,580.14
  5. Step 5: Solve for x
    x = 416,353,914,580.14/658,020.60
  6. Step 6: Final answer
    x = 632,736.90

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1.5x scale

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.