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Finding the Fourth Proportional to 612,775.24, 919,187.58 and 213,456.40

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Solution

The fourth proportional to 612,775.24, 919,187.58 and 213,456.40 is: 320,193.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,775.24 : 919,187.58 = 213,456.40 : x
  2. Step 2: Convert to fraction form
    612,775.24/919,187.58 = 213,456.40/x
  3. Step 3: Cross multiply
    612,775.24x = 919,187.58 × 213,456.40
  4. Step 4: Simplify right side
    612,775.24x = 196,206,471,751.51
  5. Step 5: Solve for x
    x = 196,206,471,751.51/612,775.24
  6. Step 6: Final answer
    x = 320,193.21

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1.5x scale

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.