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Finding the Fourth Proportional to 565,239.10, 779,718.52 and 358,128.58

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Solution

The fourth proportional to 565,239.10, 779,718.52 and 358,128.58 is: 494,020.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,239.10 : 779,718.52 = 358,128.58 : x
  2. Step 2: Convert to fraction form
    565,239.10/779,718.52 = 358,128.58/x
  3. Step 3: Cross multiply
    565,239.10x = 779,718.52 × 358,128.58
  4. Step 4: Simplify right side
    565,239.10x = 279,239,486,367.30
  5. Step 5: Solve for x
    x = 279,239,486,367.30/565,239.10
  6. Step 6: Final answer
    x = 494,020.12

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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.