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Finding the Fourth Proportional to 405,007.80, 607,511.70 and 300,031.80

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Solution

The fourth proportional to 405,007.80, 607,511.70 and 300,031.80 is: 450,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,007.80 : 607,511.70 = 300,031.80 : x
  2. Step 2: Convert to fraction form
    405,007.80/607,511.70 = 300,031.80/x
  3. Step 3: Cross multiply
    405,007.80x = 607,511.70 × 300,031.80
  4. Step 4: Simplify right side
    405,007.80x = 182,272,828,872.06
  5. Step 5: Solve for x
    x = 182,272,828,872.06/405,007.80
  6. Step 6: Final answer
    x = 450,047.70

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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.