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Finding the Fourth Proportional to 620,430.56, 930,832.68 and 221,019.20

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Solution

The fourth proportional to 620,430.56, 930,832.68 and 221,019.20 is: 331,595.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,430.56 : 930,832.68 = 221,019.20 : x
  2. Step 2: Convert to fraction form
    620,430.56/930,832.68 = 221,019.20/x
  3. Step 3: Cross multiply
    620,430.56x = 930,832.68 × 221,019.20
  4. Step 4: Simplify right side
    620,430.56x = 205,731,894,267.46
  5. Step 5: Solve for x
    x = 205,731,894,267.46/620,430.56
  6. Step 6: Final answer
    x = 331,595.36

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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.