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Finding the Fourth Proportional to 343,870.65, 515,809.35 and 103,986.45

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Solution

The fourth proportional to 343,870.65, 515,809.35 and 103,986.45 is: 155,980.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,870.65 : 515,809.35 = 103,986.45 : x
  2. Step 2: Convert to fraction form
    343,870.65/515,809.35 = 103,986.45/x
  3. Step 3: Cross multiply
    343,870.65x = 515,809.35 × 103,986.45
  4. Step 4: Simplify right side
    343,870.65x = 53,637,183,183.31
  5. Step 5: Solve for x
    x = 53,637,183,183.31/343,870.65
  6. Step 6: Final answer
    x = 155,980.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.