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Finding the Fourth Proportional to 389,616.40, 585,115.80 and 301,085.20

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Solution

The fourth proportional to 389,616.40, 585,115.80 and 301,085.20 is: 452,161.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,616.40 : 585,115.80 = 301,085.20 : x
  2. Step 2: Convert to fraction form
    389,616.40/585,115.80 = 301,085.20/x
  3. Step 3: Cross multiply
    389,616.40x = 585,115.80 × 301,085.20
  4. Step 4: Simplify right side
    389,616.40x = 176,169,707,666.16
  5. Step 5: Solve for x
    x = 176,169,707,666.16/389,616.40
  6. Step 6: Final answer
    x = 452,161.94

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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.