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Finding the Fourth Proportional to 617,218.28, 851,741.46 and 345,280.32

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Solution

The fourth proportional to 617,218.28, 851,741.46 and 345,280.32 is: 476,475.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,218.28 : 851,741.46 = 345,280.32 : x
  2. Step 2: Convert to fraction form
    617,218.28/851,741.46 = 345,280.32/x
  3. Step 3: Cross multiply
    617,218.28x = 851,741.46 × 345,280.32
  4. Step 4: Simplify right side
    617,218.28x = 294,089,562,139.67
  5. Step 5: Solve for x
    x = 294,089,562,139.67/617,218.28
  6. Step 6: Final answer
    x = 476,475.78

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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.