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Finding the Fourth Proportional to 713,761.65, 985,018.68 and 391,485.33

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Solution

The fourth proportional to 713,761.65, 985,018.68 and 391,485.33 is: 540,264.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,761.65 : 985,018.68 = 391,485.33 : x
  2. Step 2: Convert to fraction form
    713,761.65/985,018.68 = 391,485.33/x
  3. Step 3: Cross multiply
    713,761.65x = 985,018.68 × 391,485.33
  4. Step 4: Simplify right side
    713,761.65x = 385,620,362,995.96
  5. Step 5: Solve for x
    x = 385,620,362,995.96/713,761.65
  6. Step 6: Final answer
    x = 540,264.90

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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.