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Finding the Fourth Proportional to 651,566.31, 978,424.34 and 439,695.42

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Solution

The fourth proportional to 651,566.31, 978,424.34 and 439,695.42 is: 660,268.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,566.31 : 978,424.34 = 439,695.42 : x
  2. Step 2: Convert to fraction form
    651,566.31/978,424.34 = 439,695.42/x
  3. Step 3: Cross multiply
    651,566.31x = 978,424.34 × 439,695.42
  4. Step 4: Simplify right side
    651,566.31x = 430,208,698,916.05
  5. Step 5: Solve for x
    x = 430,208,698,916.05/651,566.31
  6. Step 6: Final answer
    x = 660,268.48

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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.