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Finding the Fourth Proportional to 355,120.46, 489,921.15 and 262,208.87

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Solution

The fourth proportional to 355,120.46, 489,921.15 and 262,208.87 is: 361,741.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,120.46 : 489,921.15 = 262,208.87 : x
  2. Step 2: Convert to fraction form
    355,120.46/489,921.15 = 262,208.87/x
  3. Step 3: Cross multiply
    355,120.46x = 489,921.15 × 262,208.87
  4. Step 4: Simplify right side
    355,120.46x = 128,461,668,681.00
  5. Step 5: Solve for x
    x = 128,461,668,681.00/355,120.46
  6. Step 6: Final answer
    x = 361,741.11

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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.