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Finding the Fourth Proportional to 455,075.28, 627,999.48 and 251,128.08

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Solution

The fourth proportional to 455,075.28, 627,999.48 and 251,128.08 is: 346,554.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,075.28 : 627,999.48 = 251,128.08 : x
  2. Step 2: Convert to fraction form
    455,075.28/627,999.48 = 251,128.08/x
  3. Step 3: Cross multiply
    455,075.28x = 627,999.48 × 251,128.08
  4. Step 4: Simplify right side
    455,075.28x = 157,708,303,653.40
  5. Step 5: Solve for x
    x = 157,708,303,653.40/455,075.28
  6. Step 6: Final answer
    x = 346,554.32

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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.