Home / 305,740.20-458,610.30-212,428.20

Finding the Fourth Proportional to 305,740.20, 458,610.30 and 212,428.20

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Solution

The fourth proportional to 305,740.20, 458,610.30 and 212,428.20 is: 318,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,740.20 : 458,610.30 = 212,428.20 : x
  2. Step 2: Convert to fraction form
    305,740.20/458,610.30 = 212,428.20/x
  3. Step 3: Cross multiply
    305,740.20x = 458,610.30 × 212,428.20
  4. Step 4: Simplify right side
    305,740.20x = 97,421,760,530.46
  5. Step 5: Solve for x
    x = 97,421,760,530.46/305,740.20
  6. Step 6: Final answer
    x = 318,642.30

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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.