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Finding the Fourth Proportional to 572,398, 789,869.66 and 317,729.14

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Solution

The fourth proportional to 572,398, 789,869.66 and 317,729.14 is: 438,444.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,398 : 789,869.66 = 317,729.14 : x
  2. Step 2: Convert to fraction form
    572,398/789,869.66 = 317,729.14/x
  3. Step 3: Cross multiply
    572,398x = 789,869.66 × 317,729.14
  4. Step 4: Simplify right side
    572,398x = 250,964,607,783.89
  5. Step 5: Solve for x
    x = 250,964,607,783.89/572,398
  6. Step 6: Final answer
    x = 438,444.24

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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.