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Finding the Fourth Proportional to 620,376.80, 930,565.20 and 221,030.60

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Solution

The fourth proportional to 620,376.80, 930,565.20 and 221,030.60 is: 331,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,376.80 : 930,565.20 = 221,030.60 : x
  2. Step 2: Convert to fraction form
    620,376.80/930,565.20 = 221,030.60/x
  3. Step 3: Cross multiply
    620,376.80x = 930,565.20 × 221,030.60
  4. Step 4: Simplify right side
    620,376.80x = 205,683,384,495.12
  5. Step 5: Solve for x
    x = 205,683,384,495.12/620,376.80
  6. Step 6: Final answer
    x = 331,545.90

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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.