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Finding the Fourth Proportional to 355,493.95, 490,289.36 and 253,486.80

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Solution

The fourth proportional to 355,493.95, 490,289.36 and 253,486.80 is: 349,603.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,493.95 : 490,289.36 = 253,486.80 : x
  2. Step 2: Convert to fraction form
    355,493.95/490,289.36 = 253,486.80/x
  3. Step 3: Cross multiply
    355,493.95x = 490,289.36 × 253,486.80
  4. Step 4: Simplify right side
    355,493.95x = 124,281,879,673.01
  5. Step 5: Solve for x
    x = 124,281,879,673.01/355,493.95
  6. Step 6: Final answer
    x = 349,603.36

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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.