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Finding the Fourth Proportional to 370,498.80, 511,006.21 and 318,903.70

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Solution

The fourth proportional to 370,498.80, 511,006.21 and 318,903.70 is: 439,844.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,498.80 : 511,006.21 = 318,903.70 : x
  2. Step 2: Convert to fraction form
    370,498.80/511,006.21 = 318,903.70/x
  3. Step 3: Cross multiply
    370,498.80x = 511,006.21 × 318,903.70
  4. Step 4: Simplify right side
    370,498.80x = 162,961,771,091.98
  5. Step 5: Solve for x
    x = 162,961,771,091.98/370,498.80
  6. Step 6: Final answer
    x = 439,844.26

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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.