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Finding the Fourth Proportional to 522,784.40, 783,139.80 and 311,795.60

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Solution

The fourth proportional to 522,784.40, 783,139.80 and 311,795.60 is: 467,075.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,784.40 : 783,139.80 = 311,795.60 : x
  2. Step 2: Convert to fraction form
    522,784.40/783,139.80 = 311,795.60/x
  3. Step 3: Cross multiply
    522,784.40x = 783,139.80 × 311,795.60
  4. Step 4: Simplify right side
    522,784.40x = 244,179,543,824.88
  5. Step 5: Solve for x
    x = 244,179,543,824.88/522,784.40
  6. Step 6: Final answer
    x = 467,075.04

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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.