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Finding the Fourth Proportional to 455,280.60, 628,283.78 and 251,331.60

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Solution

The fourth proportional to 455,280.60, 628,283.78 and 251,331.60 is: 346,835.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,280.60 : 628,283.78 = 251,331.60 : x
  2. Step 2: Convert to fraction form
    455,280.60/628,283.78 = 251,331.60/x
  3. Step 3: Cross multiply
    455,280.60x = 628,283.78 × 251,331.60
  4. Step 4: Simplify right side
    455,280.60x = 157,907,567,681.45
  5. Step 5: Solve for x
    x = 157,907,567,681.45/455,280.60
  6. Step 6: Final answer
    x = 346,835.70

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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.