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Finding the Fourth Proportional to 339,145.80, 508,718.70 and 319,792.20

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Solution

The fourth proportional to 339,145.80, 508,718.70 and 319,792.20 is: 479,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,145.80 : 508,718.70 = 319,792.20 : x
  2. Step 2: Convert to fraction form
    339,145.80/508,718.70 = 319,792.20/x
  3. Step 3: Cross multiply
    339,145.80x = 508,718.70 × 319,792.20
  4. Step 4: Simplify right side
    339,145.80x = 162,684,272,254.14
  5. Step 5: Solve for x
    x = 162,684,272,254.14/339,145.80
  6. Step 6: Final answer
    x = 479,688.30

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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.