Home / 319,019.79-440,278.34-238,307.20

Finding the Fourth Proportional to 319,019.79, 440,278.34 and 238,307.20

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Solution

The fourth proportional to 319,019.79, 440,278.34 and 238,307.20 is: 328,887.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,019.79 : 440,278.34 = 238,307.20 : x
  2. Step 2: Convert to fraction form
    319,019.79/440,278.34 = 238,307.20/x
  3. Step 3: Cross multiply
    319,019.79x = 440,278.34 × 238,307.20
  4. Step 4: Simplify right side
    319,019.79x = 104,921,498,426.05
  5. Step 5: Solve for x
    x = 104,921,498,426.05/319,019.79
  6. Step 6: Final answer
    x = 328,887.12

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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.