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Finding the Fourth Proportional to 999,490.56, 1,379,329.56 and 546,781.56

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Solution

The fourth proportional to 999,490.56, 1,379,329.56 and 546,781.56 is: 754,576.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,490.56 : 1,379,329.56 = 546,781.56 : x
  2. Step 2: Convert to fraction form
    999,490.56/1,379,329.56 = 546,781.56/x
  3. Step 3: Cross multiply
    999,490.56x = 1,379,329.56 × 546,781.56
  4. Step 4: Simplify right side
    999,490.56x = 754,191,968,570.91
  5. Step 5: Solve for x
    x = 754,191,968,570.91/999,490.56
  6. Step 6: Final answer
    x = 754,576.38

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1.5x scale

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.