Home / 319,512.20-478,685.10-260,025.80

Finding the Fourth Proportional to 319,512.20, 478,685.10 and 260,025.80

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Solution

The fourth proportional to 319,512.20, 478,685.10 and 260,025.80 is: 389,564.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,512.20 : 478,685.10 = 260,025.80 : x
  2. Step 2: Convert to fraction form
    319,512.20/478,685.10 = 260,025.80/x
  3. Step 3: Cross multiply
    319,512.20x = 478,685.10 × 260,025.80
  4. Step 4: Simplify right side
    319,512.20x = 124,470,476,075.58
  5. Step 5: Solve for x
    x = 124,470,476,075.58/319,512.20
  6. Step 6: Final answer
    x = 389,564.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.