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Finding the Fourth Proportional to 390,800.40, 586,200.60 and 306,819.60

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Solution

The fourth proportional to 390,800.40, 586,200.60 and 306,819.60 is: 460,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,800.40 : 586,200.60 = 306,819.60 : x
  2. Step 2: Convert to fraction form
    390,800.40/586,200.60 = 306,819.60/x
  3. Step 3: Cross multiply
    390,800.40x = 586,200.60 × 306,819.60
  4. Step 4: Simplify right side
    390,800.40x = 179,857,833,611.76
  5. Step 5: Solve for x
    x = 179,857,833,611.76/390,800.40
  6. Step 6: Final answer
    x = 460,229.40

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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.