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Finding the Fourth Proportional to 590,625.60, 885,938.40 and 431,995.20

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Solution

The fourth proportional to 590,625.60, 885,938.40 and 431,995.20 is: 647,992.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    590,625.60 : 885,938.40 = 431,995.20 : x
  2. Step 2: Convert to fraction form
    590,625.60/885,938.40 = 431,995.20/x
  3. Step 3: Cross multiply
    590,625.60x = 885,938.40 × 431,995.20
  4. Step 4: Simplify right side
    590,625.60x = 382,721,136,295.68
  5. Step 5: Solve for x
    x = 382,721,136,295.68/590,625.60
  6. Step 6: Final answer
    x = 647,992.80

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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.