Home / 389,900.15-585,036.15-212,403.23

Finding the Fourth Proportional to 389,900.15, 585,036.15 and 212,403.23

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Solution

The fourth proportional to 389,900.15, 585,036.15 and 212,403.23 is: 318,706.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,900.15 : 585,036.15 = 212,403.23 : x
  2. Step 2: Convert to fraction form
    389,900.15/585,036.15 = 212,403.23/x
  3. Step 3: Cross multiply
    389,900.15x = 585,036.15 × 212,403.23
  4. Step 4: Simplify right side
    389,900.15x = 124,263,563,939.57
  5. Step 5: Solve for x
    x = 124,263,563,939.57/389,900.15
  6. Step 6: Final answer
    x = 318,706.12

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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.