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Finding the Fourth Proportional to 608,021.20, 912,031.80 and 328,085.20

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Solution

The fourth proportional to 608,021.20, 912,031.80 and 328,085.20 is: 492,127.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,021.20 : 912,031.80 = 328,085.20 : x
  2. Step 2: Convert to fraction form
    608,021.20/912,031.80 = 328,085.20/x
  3. Step 3: Cross multiply
    608,021.20x = 912,031.80 × 328,085.20
  4. Step 4: Simplify right side
    608,021.20x = 299,224,135,509.36
  5. Step 5: Solve for x
    x = 299,224,135,509.36/608,021.20
  6. Step 6: Final answer
    x = 492,127.80

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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.