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Finding the Fourth Proportional to 586,310.40, 879,465.60 and 305,791.20

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Solution

The fourth proportional to 586,310.40, 879,465.60 and 305,791.20 is: 458,686.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,310.40 : 879,465.60 = 305,791.20 : x
  2. Step 2: Convert to fraction form
    586,310.40/879,465.60 = 305,791.20/x
  3. Step 3: Cross multiply
    586,310.40x = 879,465.60 × 305,791.20
  4. Step 4: Simplify right side
    586,310.40x = 268,932,841,182.72
  5. Step 5: Solve for x
    x = 268,932,841,182.72/586,310.40
  6. Step 6: Final answer
    x = 458,686.80

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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.