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Finding the Fourth Proportional to 370,480.64, 511,347.13 and 209,429.15

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Solution

The fourth proportional to 370,480.64, 511,347.13 and 209,429.15 is: 289,059.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,480.64 : 511,347.13 = 209,429.15 : x
  2. Step 2: Convert to fraction form
    370,480.64/511,347.13 = 209,429.15/x
  3. Step 3: Cross multiply
    370,480.64x = 511,347.13 × 209,429.15
  4. Step 4: Simplify right side
    370,480.64x = 107,090,991,710.53
  5. Step 5: Solve for x
    x = 107,090,991,710.53/370,480.64
  6. Step 6: Final answer
    x = 289,059.62

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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.