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Finding the Fourth Proportional to 389,872.36, 585,041.80 and 358,146.28

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Solution

The fourth proportional to 389,872.36, 585,041.80 and 358,146.28 is: 537,433.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,872.36 : 585,041.80 = 358,146.28 : x
  2. Step 2: Convert to fraction form
    389,872.36/585,041.80 = 358,146.28/x
  3. Step 3: Cross multiply
    389,872.36x = 585,041.80 × 358,146.28
  4. Step 4: Simplify right side
    389,872.36x = 209,530,544,314.50
  5. Step 5: Solve for x
    x = 209,530,544,314.50/389,872.36
  6. Step 6: Final answer
    x = 537,433.70

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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.