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Finding the Fourth Proportional to 279,357.65, 385,521.63 and 152,041.31

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Solution

The fourth proportional to 279,357.65, 385,521.63 and 152,041.31 is: 209,821.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,357.65 : 385,521.63 = 152,041.31 : x
  2. Step 2: Convert to fraction form
    279,357.65/385,521.63 = 152,041.31/x
  3. Step 3: Cross multiply
    279,357.65x = 385,521.63 × 152,041.31
  4. Step 4: Simplify right side
    279,357.65x = 58,615,213,658.54
  5. Step 5: Solve for x
    x = 58,615,213,658.54/279,357.65
  6. Step 6: Final answer
    x = 209,821.40

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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.