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Finding the Fourth Proportional to 455,343.55, 628,357.82 and 251,390.32

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Solution

The fourth proportional to 455,343.55, 628,357.82 and 251,390.32 is: 346,909.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,343.55 : 628,357.82 = 251,390.32 : x
  2. Step 2: Convert to fraction form
    455,343.55/628,357.82 = 251,390.32/x
  3. Step 3: Cross multiply
    455,343.55x = 628,357.82 × 251,390.32
  4. Step 4: Simplify right side
    455,343.55x = 157,963,070,616.46
  5. Step 5: Solve for x
    x = 157,963,070,616.46/455,343.55
  6. Step 6: Final answer
    x = 346,909.65

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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.