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Finding the Fourth Proportional to 628,078.48, 866,907.12 and 356,308.36

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Solution

The fourth proportional to 628,078.48, 866,907.12 and 356,308.36 is: 491,795.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,078.48 : 866,907.12 = 356,308.36 : x
  2. Step 2: Convert to fraction form
    628,078.48/866,907.12 = 356,308.36/x
  3. Step 3: Cross multiply
    628,078.48x = 866,907.12 × 356,308.36
  4. Step 4: Simplify right side
    628,078.48x = 308,886,254,199.52
  5. Step 5: Solve for x
    x = 308,886,254,199.52/628,078.48
  6. Step 6: Final answer
    x = 491,795.63

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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.