Home / 777,321.40-1,072,678.24-475,515.40

Finding the Fourth Proportional to 777,321.40, 1,072,678.24 and 475,515.40

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Solution

The fourth proportional to 777,321.40, 1,072,678.24 and 475,515.40 is: 656,195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,321.40 : 1,072,678.24 = 475,515.40 : x
  2. Step 2: Convert to fraction form
    777,321.40/1,072,678.24 = 475,515.40/x
  3. Step 3: Cross multiply
    777,321.40x = 1,072,678.24 × 475,515.40
  4. Step 4: Simplify right side
    777,321.40x = 510,075,022,364.90
  5. Step 5: Solve for x
    x = 510,075,022,364.90/777,321.40
  6. Step 6: Final answer
    x = 656,195.78

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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.