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Finding the Fourth Proportional to 310,760.55, 428,842.45 and 189,901.46

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Solution

The fourth proportional to 310,760.55, 428,842.45 and 189,901.46 is: 262,059.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,760.55 : 428,842.45 = 189,901.46 : x
  2. Step 2: Convert to fraction form
    310,760.55/428,842.45 = 189,901.46/x
  3. Step 3: Cross multiply
    310,760.55x = 428,842.45 × 189,901.46
  4. Step 4: Simplify right side
    310,760.55x = 81,437,808,674.46
  5. Step 5: Solve for x
    x = 81,437,808,674.46/310,760.55
  6. Step 6: Final answer
    x = 262,059.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.