Home / 918,245.50-1,376,579.40-319,128.82

Finding the Fourth Proportional to 918,245.50, 1,376,579.40 and 319,128.82

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Solution

The fourth proportional to 918,245.50, 1,376,579.40 and 319,128.82 is: 478,419.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,245.50 : 1,376,579.40 = 319,128.82 : x
  2. Step 2: Convert to fraction form
    918,245.50/1,376,579.40 = 319,128.82/x
  3. Step 3: Cross multiply
    918,245.50x = 1,376,579.40 × 319,128.82
  4. Step 4: Simplify right side
    918,245.50x = 439,306,159,558.31
  5. Step 5: Solve for x
    x = 439,306,159,558.31/918,245.50
  6. Step 6: Final answer
    x = 478,419.07

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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.