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Finding the Fourth Proportional to 500,673.48, 691,020.10 and 319,441.66

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Solution

The fourth proportional to 500,673.48, 691,020.10 and 319,441.66 is: 440,887.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,673.48 : 691,020.10 = 319,441.66 : x
  2. Step 2: Convert to fraction form
    500,673.48/691,020.10 = 319,441.66/x
  3. Step 3: Cross multiply
    500,673.48x = 691,020.10 × 319,441.66
  4. Step 4: Simplify right side
    500,673.48x = 220,740,607,837.37
  5. Step 5: Solve for x
    x = 220,740,607,837.37/500,673.48
  6. Step 6: Final answer
    x = 440,887.36

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1.5x scale

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.