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Finding the Fourth Proportional to 977,398.63, 1,348,010.31 and 687,968.32

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Solution

The fourth proportional to 977,398.63, 1,348,010.31 and 687,968.32 is: 948,833.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    977,398.63 : 1,348,010.31 = 687,968.32 : x
  2. Step 2: Convert to fraction form
    977,398.63/1,348,010.31 = 687,968.32/x
  3. Step 3: Cross multiply
    977,398.63x = 1,348,010.31 × 687,968.32
  4. Step 4: Simplify right side
    977,398.63x = 927,388,388,313.38
  5. Step 5: Solve for x
    x = 927,388,388,313.38/977,398.63
  6. Step 6: Final answer
    x = 948,833.32

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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.