Home / 405,302.08-607,988.76-105,780.28

Finding the Fourth Proportional to 405,302.08, 607,988.76 and 105,780.28

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Solution

The fourth proportional to 405,302.08, 607,988.76 and 105,780.28 is: 158,679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,302.08 : 607,988.76 = 105,780.28 : x
  2. Step 2: Convert to fraction form
    405,302.08/607,988.76 = 105,780.28/x
  3. Step 3: Cross multiply
    405,302.08x = 607,988.76 × 105,780.28
  4. Step 4: Simplify right side
    405,302.08x = 64,313,221,269.65
  5. Step 5: Solve for x
    x = 64,313,221,269.65/405,302.08
  6. Step 6: Final answer
    x = 158,679.72

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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.