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Finding the Fourth Proportional to 620,424.56, 930,823.68 and 221,013.20

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Solution

The fourth proportional to 620,424.56, 930,823.68 and 221,013.20 is: 331,586.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,424.56 : 930,823.68 = 221,013.20 : x
  2. Step 2: Convert to fraction form
    620,424.56/930,823.68 = 221,013.20/x
  3. Step 3: Cross multiply
    620,424.56x = 930,823.68 × 221,013.20
  4. Step 4: Simplify right side
    620,424.56x = 205,724,320,152.58
  5. Step 5: Solve for x
    x = 205,724,320,152.58/620,424.56
  6. Step 6: Final answer
    x = 331,586.36

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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.