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Finding the Fourth Proportional to 370,535.89, 511,281.42 and 215,521.51

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Solution

The fourth proportional to 370,535.89, 511,281.42 and 215,521.51 is: 297,385.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,535.89 : 511,281.42 = 215,521.51 : x
  2. Step 2: Convert to fraction form
    370,535.89/511,281.42 = 215,521.51/x
  3. Step 3: Cross multiply
    370,535.89x = 511,281.42 × 215,521.51
  4. Step 4: Simplify right side
    370,535.89x = 110,192,143,673.34
  5. Step 5: Solve for x
    x = 110,192,143,673.34/370,535.89
  6. Step 6: Final answer
    x = 297,385.89

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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.