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Finding the Fourth Proportional to 620,730, 856,608.30 and 352,458

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Solution

The fourth proportional to 620,730, 856,608.30 and 352,458 is: 486,392.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,730 : 856,608.30 = 352,458 : x
  2. Step 2: Convert to fraction form
    620,730/856,608.30 = 352,458/x
  3. Step 3: Cross multiply
    620,730x = 856,608.30 × 352,458
  4. Step 4: Simplify right side
    620,730x = 301,918,448,201.40
  5. Step 5: Solve for x
    x = 301,918,448,201.40/620,730
  6. Step 6: Final answer
    x = 486,392.55

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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.