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Finding the Fourth Proportional to 370,428.60, 511,275.06 and 209,376.84

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Solution

The fourth proportional to 370,428.60, 511,275.06 and 209,376.84 is: 288,987.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,428.60 : 511,275.06 = 209,376.84 : x
  2. Step 2: Convert to fraction form
    370,428.60/511,275.06 = 209,376.84/x
  3. Step 3: Cross multiply
    370,428.60x = 511,275.06 × 209,376.84
  4. Step 4: Simplify right side
    370,428.60x = 107,049,156,433.61
  5. Step 5: Solve for x
    x = 107,049,156,433.61/370,428.60
  6. Step 6: Final answer
    x = 288,987.29

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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.