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Finding the Fourth Proportional to 306,815.20, 459,445.20 and 292,818.40

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Solution

The fourth proportional to 306,815.20, 459,445.20 and 292,818.40 is: 438,485.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,815.20 : 459,445.20 = 292,818.40 : x
  2. Step 2: Convert to fraction form
    306,815.20/459,445.20 = 292,818.40/x
  3. Step 3: Cross multiply
    306,815.20x = 459,445.20 × 292,818.40
  4. Step 4: Simplify right side
    306,815.20x = 134,534,008,351.68
  5. Step 5: Solve for x
    x = 134,534,008,351.68/306,815.20
  6. Step 6: Final answer
    x = 438,485.47

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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.