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Finding the Fourth Proportional to 612,356.48, 845,080.79 and 340,428.91

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Solution

The fourth proportional to 612,356.48, 845,080.79 and 340,428.91 is: 469,807.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,356.48 : 845,080.79 = 340,428.91 : x
  2. Step 2: Convert to fraction form
    612,356.48/845,080.79 = 340,428.91/x
  3. Step 3: Cross multiply
    612,356.48x = 845,080.79 × 340,428.91
  4. Step 4: Simplify right side
    612,356.48x = 287,689,932,201.64
  5. Step 5: Solve for x
    x = 287,689,932,201.64/612,356.48
  6. Step 6: Final answer
    x = 469,807.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.