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Finding the Fourth Proportional to 617,145.19, 851,724.50 and 355,509.50

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Solution

The fourth proportional to 617,145.19, 851,724.50 and 355,509.50 is: 490,640.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,145.19 : 851,724.50 = 355,509.50 : x
  2. Step 2: Convert to fraction form
    617,145.19/851,724.50 = 355,509.50/x
  3. Step 3: Cross multiply
    617,145.19x = 851,724.50 × 355,509.50
  4. Step 4: Simplify right side
    617,145.19x = 302,796,145,096.58
  5. Step 5: Solve for x
    x = 302,796,145,096.58/617,145.19
  6. Step 6: Final answer
    x = 490,640.05

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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.