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Finding the Fourth Proportional to 620,376.60, 930,346.20 and 221,030.40

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Solution

The fourth proportional to 620,376.60, 930,346.20 and 221,030.40 is: 331,467.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,376.60 : 930,346.20 = 221,030.40 : x
  2. Step 2: Convert to fraction form
    620,376.60/930,346.20 = 221,030.40/x
  3. Step 3: Cross multiply
    620,376.60x = 930,346.20 × 221,030.40
  4. Step 4: Simplify right side
    620,376.60x = 205,634,792,724.48
  5. Step 5: Solve for x
    x = 205,634,792,724.48/620,376.60
  6. Step 6: Final answer
    x = 331,467.68

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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.