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Finding the Fourth Proportional to 587,621.88, 810,918.54 and 319,349.88

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Solution

The fourth proportional to 587,621.88, 810,918.54 and 319,349.88 is: 440,703.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,621.88 : 810,918.54 = 319,349.88 : x
  2. Step 2: Convert to fraction form
    587,621.88/810,918.54 = 319,349.88/x
  3. Step 3: Cross multiply
    587,621.88x = 810,918.54 × 319,349.88
  4. Step 4: Simplify right side
    587,621.88x = 258,966,738,438.78
  5. Step 5: Solve for x
    x = 258,966,738,438.78/587,621.88
  6. Step 6: Final answer
    x = 440,703.02

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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.