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Finding the Fourth Proportional to 355,053.93, 489,986.51 and 209,984.07

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Solution

The fourth proportional to 355,053.93, 489,986.51 and 209,984.07 is: 289,785.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,053.93 : 489,986.51 = 209,984.07 : x
  2. Step 2: Convert to fraction form
    355,053.93/489,986.51 = 209,984.07/x
  3. Step 3: Cross multiply
    355,053.93x = 489,986.51 × 209,984.07
  4. Step 4: Simplify right side
    355,053.93x = 102,889,359,164.96
  5. Step 5: Solve for x
    x = 102,889,359,164.96/355,053.93
  6. Step 6: Final answer
    x = 289,785.16

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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.