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Finding the Fourth Proportional to 354,200.40, 531,300.60 and 340,422.30

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Solution

The fourth proportional to 354,200.40, 531,300.60 and 340,422.30 is: 510,633.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,200.40 : 531,300.60 = 340,422.30 : x
  2. Step 2: Convert to fraction form
    354,200.40/531,300.60 = 340,422.30/x
  3. Step 3: Cross multiply
    354,200.40x = 531,300.60 × 340,422.30
  4. Step 4: Simplify right side
    354,200.40x = 180,866,572,243.38
  5. Step 5: Solve for x
    x = 180,866,572,243.38/354,200.40
  6. Step 6: Final answer
    x = 510,633.45

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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.