Home / 721,901.80-1,082,852.70-658,916.20

Finding the Fourth Proportional to 721,901.80, 1,082,852.70 and 658,916.20

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Solution

The fourth proportional to 721,901.80, 1,082,852.70 and 658,916.20 is: 988,374.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,901.80 : 1,082,852.70 = 658,916.20 : x
  2. Step 2: Convert to fraction form
    721,901.80/1,082,852.70 = 658,916.20/x
  3. Step 3: Cross multiply
    721,901.80x = 1,082,852.70 × 658,916.20
  4. Step 4: Simplify right side
    721,901.80x = 713,509,186,243.74
  5. Step 5: Solve for x
    x = 713,509,186,243.74/721,901.80
  6. Step 6: Final answer
    x = 988,374.30

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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.