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Finding the Fourth Proportional to 717,315.67, 989,902.11 and 395,027.07

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Solution

The fourth proportional to 717,315.67, 989,902.11 and 395,027.07 is: 545,140.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,315.67 : 989,902.11 = 395,027.07 : x
  2. Step 2: Convert to fraction form
    717,315.67/989,902.11 = 395,027.07/x
  3. Step 3: Cross multiply
    717,315.67x = 989,902.11 × 395,027.07
  4. Step 4: Simplify right side
    717,315.67x = 391,038,130,100.12
  5. Step 5: Solve for x
    x = 391,038,130,100.12/717,315.67
  6. Step 6: Final answer
    x = 545,140.93

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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.