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Finding the Fourth Proportional to 398,777.80, 598,166.70 and 355,232.20

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Solution

The fourth proportional to 398,777.80, 598,166.70 and 355,232.20 is: 532,848.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,777.80 : 598,166.70 = 355,232.20 : x
  2. Step 2: Convert to fraction form
    398,777.80/598,166.70 = 355,232.20/x
  3. Step 3: Cross multiply
    398,777.80x = 598,166.70 × 355,232.20
  4. Step 4: Simplify right side
    398,777.80x = 212,488,072,807.74
  5. Step 5: Solve for x
    x = 212,488,072,807.74/398,777.80
  6. Step 6: Final answer
    x = 532,848.30

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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.