Home / 779,576.64-1,075,815.76-421,880.64

Finding the Fourth Proportional to 779,576.64, 1,075,815.76 and 421,880.64

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Solution

The fourth proportional to 779,576.64, 1,075,815.76 and 421,880.64 is: 582,195.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,576.64 : 1,075,815.76 = 421,880.64 : x
  2. Step 2: Convert to fraction form
    779,576.64/1,075,815.76 = 421,880.64/x
  3. Step 3: Cross multiply
    779,576.64x = 1,075,815.76 × 421,880.64
  4. Step 4: Simplify right side
    779,576.64x = 453,865,841,350.89
  5. Step 5: Solve for x
    x = 453,865,841,350.89/779,576.64
  6. Step 6: Final answer
    x = 582,195.28

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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.