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Finding the Fourth Proportional to 710,980.80, 1,066,624.80 and 212,395.20

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Solution

The fourth proportional to 710,980.80, 1,066,624.80 and 212,395.20 is: 318,638.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,980.80 : 1,066,624.80 = 212,395.20 : x
  2. Step 2: Convert to fraction form
    710,980.80/1,066,624.80 = 212,395.20/x
  3. Step 3: Cross multiply
    710,980.80x = 1,066,624.80 × 212,395.20
  4. Step 4: Simplify right side
    710,980.80x = 226,545,987,720.96
  5. Step 5: Solve for x
    x = 226,545,987,720.96/710,980.80
  6. Step 6: Final answer
    x = 318,638.69

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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.