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Finding the Fourth Proportional to 777,897, 1,073,497.86 and 420,201

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Solution

The fourth proportional to 777,897, 1,073,497.86 and 420,201 is: 579,877.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,897 : 1,073,497.86 = 420,201 : x
  2. Step 2: Convert to fraction form
    777,897/1,073,497.86 = 420,201/x
  3. Step 3: Cross multiply
    777,897x = 1,073,497.86 × 420,201
  4. Step 4: Simplify right side
    777,897x = 451,084,874,269.86
  5. Step 5: Solve for x
    x = 451,084,874,269.86/777,897
  6. Step 6: Final answer
    x = 579,877.38

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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.