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Finding the Fourth Proportional to 307,420.40, 461,130.60 and 287,591.60

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Solution

The fourth proportional to 307,420.40, 461,130.60 and 287,591.60 is: 431,387.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,420.40 : 461,130.60 = 287,591.60 : x
  2. Step 2: Convert to fraction form
    307,420.40/461,130.60 = 287,591.60/x
  3. Step 3: Cross multiply
    307,420.40x = 461,130.60 × 287,591.60
  4. Step 4: Simplify right side
    307,420.40x = 132,617,287,062.96
  5. Step 5: Solve for x
    x = 132,617,287,062.96/307,420.40
  6. Step 6: Final answer
    x = 431,387.40

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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.