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Finding the Fourth Proportional to 572,791.60, 858,863.40 and 217,817.20

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Solution

The fourth proportional to 572,791.60, 858,863.40 and 217,817.20 is: 326,602.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,791.60 : 858,863.40 = 217,817.20 : x
  2. Step 2: Convert to fraction form
    572,791.60/858,863.40 = 217,817.20/x
  3. Step 3: Cross multiply
    572,791.60x = 858,863.40 × 217,817.20
  4. Step 4: Simplify right side
    572,791.60x = 187,075,220,970.48
  5. Step 5: Solve for x
    x = 187,075,220,970.48/572,791.60
  6. Step 6: Final answer
    x = 326,602.59

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Double scale
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Similar ratio
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1.5x scale

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.