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Finding the Fourth Proportional to 708,774.48, 978,073.32 and 402,810.48

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Solution

The fourth proportional to 708,774.48, 978,073.32 and 402,810.48 is: 555,858.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,774.48 : 978,073.32 = 402,810.48 : x
  2. Step 2: Convert to fraction form
    708,774.48/978,073.32 = 402,810.48/x
  3. Step 3: Cross multiply
    708,774.48x = 978,073.32 × 402,810.48
  4. Step 4: Simplify right side
    708,774.48x = 393,978,183,504.39
  5. Step 5: Solve for x
    x = 393,978,183,504.39/708,774.48
  6. Step 6: Final answer
    x = 555,858.31

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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.