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Finding the Fourth Proportional to 620,484.09, 856,174.80 and 348,499.90

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Solution

The fourth proportional to 620,484.09, 856,174.80 and 348,499.90 is: 480,877.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,484.09 : 856,174.80 = 348,499.90 : x
  2. Step 2: Convert to fraction form
    620,484.09/856,174.80 = 348,499.90/x
  3. Step 3: Cross multiply
    620,484.09x = 856,174.80 × 348,499.90
  4. Step 4: Simplify right side
    620,484.09x = 298,376,830,042.08
  5. Step 5: Solve for x
    x = 298,376,830,042.08/620,484.09
  6. Step 6: Final answer
    x = 480,877.49

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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.