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Finding the Fourth Proportional to 370,671.51, 511,521.15 and 209,520.90

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Solution

The fourth proportional to 370,671.51, 511,521.15 and 209,520.90 is: 289,135.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,671.51 : 511,521.15 = 209,520.90 : x
  2. Step 2: Convert to fraction form
    370,671.51/511,521.15 = 209,520.90/x
  3. Step 3: Cross multiply
    370,671.51x = 511,521.15 × 209,520.90
  4. Step 4: Simplify right side
    370,671.51x = 107,174,371,717.04
  5. Step 5: Solve for x
    x = 107,174,371,717.04/370,671.51
  6. Step 6: Final answer
    x = 289,135.71

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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.