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Finding the Fourth Proportional to 620,485.97, 856,177.38 and 348,501.78

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Solution

The fourth proportional to 620,485.97, 856,177.38 and 348,501.78 is: 480,880.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,485.97 : 856,177.38 = 348,501.78 : x
  2. Step 2: Convert to fraction form
    620,485.97/856,177.38 = 348,501.78/x
  3. Step 3: Cross multiply
    620,485.97x = 856,177.38 × 348,501.78
  4. Step 4: Simplify right side
    620,485.97x = 298,379,340,925.74
  5. Step 5: Solve for x
    x = 298,379,340,925.74/620,485.97
  6. Step 6: Final answer
    x = 480,880.08

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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.