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Finding the Fourth Proportional to 620,894.50, 856,835.49 and 352,622.50

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Solution

The fourth proportional to 620,894.50, 856,835.49 and 352,622.50 is: 486,619.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,894.50 : 856,835.49 = 352,622.50 : x
  2. Step 2: Convert to fraction form
    620,894.50/856,835.49 = 352,622.50/x
  3. Step 3: Cross multiply
    620,894.50x = 856,835.49 × 352,622.50
  4. Step 4: Simplify right side
    620,894.50x = 302,139,472,572.53
  5. Step 5: Solve for x
    x = 302,139,472,572.53/620,894.50
  6. Step 6: Final answer
    x = 486,619.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.