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Finding the Fourth Proportional to 478,315.45, 660,075.22 and 263,455.52

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Solution

The fourth proportional to 478,315.45, 660,075.22 and 263,455.52 is: 363,568.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,315.45 : 660,075.22 = 263,455.52 : x
  2. Step 2: Convert to fraction form
    478,315.45/660,075.22 = 263,455.52/x
  3. Step 3: Cross multiply
    478,315.45x = 660,075.22 × 263,455.52
  4. Step 4: Simplify right side
    478,315.45x = 173,900,458,015.39
  5. Step 5: Solve for x
    x = 173,900,458,015.39/478,315.45
  6. Step 6: Final answer
    x = 363,568.56

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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.