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Finding the Fourth Proportional to 572,072.80, 858,109.20 and 145,607.80

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Solution

The fourth proportional to 572,072.80, 858,109.20 and 145,607.80 is: 218,411.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,072.80 : 858,109.20 = 145,607.80 : x
  2. Step 2: Convert to fraction form
    572,072.80/858,109.20 = 145,607.80/x
  3. Step 3: Cross multiply
    572,072.80x = 858,109.20 × 145,607.80
  4. Step 4: Simplify right side
    572,072.80x = 124,947,392,771.76
  5. Step 5: Solve for x
    x = 124,947,392,771.76/572,072.80
  6. Step 6: Final answer
    x = 218,411.70

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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.