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Finding the Fourth Proportional to 390,495.80, 585,075.05 and 213,127.27

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Solution

The fourth proportional to 390,495.80, 585,075.05 and 213,127.27 is: 319,325.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,495.80 : 585,075.05 = 213,127.27 : x
  2. Step 2: Convert to fraction form
    390,495.80/585,075.05 = 213,127.27/x
  3. Step 3: Cross multiply
    390,495.80x = 585,075.05 × 213,127.27
  4. Step 4: Simplify right side
    390,495.80x = 124,695,446,422.52
  5. Step 5: Solve for x
    x = 124,695,446,422.52/390,495.80
  6. Step 6: Final answer
    x = 319,325.96

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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.