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Finding the Fourth Proportional to 477,719.60, 716,579.40 and 328,420.40

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Solution

The fourth proportional to 477,719.60, 716,579.40 and 328,420.40 is: 492,630.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,719.60 : 716,579.40 = 328,420.40 : x
  2. Step 2: Convert to fraction form
    477,719.60/716,579.40 = 328,420.40/x
  3. Step 3: Cross multiply
    477,719.60x = 716,579.40 × 328,420.40
  4. Step 4: Simplify right side
    477,719.60x = 235,339,293,179.76
  5. Step 5: Solve for x
    x = 235,339,293,179.76/477,719.60
  6. Step 6: Final answer
    x = 492,630.60

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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.