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Finding the Fourth Proportional to 370,560.78, 511,360.56 and 209,412.30

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Solution

The fourth proportional to 370,560.78, 511,360.56 and 209,412.30 is: 288,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,560.78 : 511,360.56 = 209,412.30 : x
  2. Step 2: Convert to fraction form
    370,560.78/511,360.56 = 209,412.30/x
  3. Step 3: Cross multiply
    370,560.78x = 511,360.56 × 209,412.30
  4. Step 4: Simplify right side
    370,560.78x = 107,085,190,998.89
  5. Step 5: Solve for x
    x = 107,085,190,998.89/370,560.78
  6. Step 6: Final answer
    x = 288,981.45

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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.