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Finding the Fourth Proportional to 389,866.65, 585,033.26 and 358,140.57

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Solution

The fourth proportional to 389,866.65, 585,033.26 and 358,140.57 is: 537,425.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,866.65 : 585,033.26 = 358,140.57 : x
  2. Step 2: Convert to fraction form
    389,866.65/585,033.26 = 358,140.57/x
  3. Step 3: Cross multiply
    389,866.65x = 585,033.26 × 358,140.57
  4. Step 4: Simplify right side
    389,866.65x = 209,524,145,205.36
  5. Step 5: Solve for x
    x = 209,524,145,205.36/389,866.65
  6. Step 6: Final answer
    x = 537,425.16

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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.