Home / 917,999.80-1,376,999.70-319,636.60

Finding the Fourth Proportional to 917,999.80, 1,376,999.70 and 319,636.60

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Solution

The fourth proportional to 917,999.80, 1,376,999.70 and 319,636.60 is: 479,454.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,999.80 : 1,376,999.70 = 319,636.60 : x
  2. Step 2: Convert to fraction form
    917,999.80/1,376,999.70 = 319,636.60/x
  3. Step 3: Cross multiply
    917,999.80x = 1,376,999.70 × 319,636.60
  4. Step 4: Simplify right side
    917,999.80x = 440,139,502,309.02
  5. Step 5: Solve for x
    x = 440,139,502,309.02/917,999.80
  6. Step 6: Final answer
    x = 479,454.90

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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.