Home / 617,143.06-851,721.56-355,507.38

Finding the Fourth Proportional to 617,143.06, 851,721.56 and 355,507.38

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Solution

The fourth proportional to 617,143.06, 851,721.56 and 355,507.38 is: 490,637.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,143.06 : 851,721.56 = 355,507.38 : x
  2. Step 2: Convert to fraction form
    617,143.06/851,721.56 = 355,507.38/x
  3. Step 3: Cross multiply
    617,143.06x = 851,721.56 × 355,507.38
  4. Step 4: Simplify right side
    617,143.06x = 302,793,300,285.11
  5. Step 5: Solve for x
    x = 302,793,300,285.11/617,143.06
  6. Step 6: Final answer
    x = 490,637.13

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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.