Home / 648,020.80-972,031.20-611,279.20

Finding the Fourth Proportional to 648,020.80, 972,031.20 and 611,279.20

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Solution

The fourth proportional to 648,020.80, 972,031.20 and 611,279.20 is: 916,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,020.80 : 972,031.20 = 611,279.20 : x
  2. Step 2: Convert to fraction form
    648,020.80/972,031.20 = 611,279.20/x
  3. Step 3: Cross multiply
    648,020.80x = 972,031.20 × 611,279.20
  4. Step 4: Simplify right side
    648,020.80x = 594,182,454,311.04
  5. Step 5: Solve for x
    x = 594,182,454,311.04/648,020.80
  6. Step 6: Final answer
    x = 916,918.80

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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.