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Finding the Fourth Proportional to 867,830.20, 1,301,745.30 and 553,679.80

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Solution

The fourth proportional to 867,830.20, 1,301,745.30 and 553,679.80 is: 830,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,830.20 : 1,301,745.30 = 553,679.80 : x
  2. Step 2: Convert to fraction form
    867,830.20/1,301,745.30 = 553,679.80/x
  3. Step 3: Cross multiply
    867,830.20x = 1,301,745.30 × 553,679.80
  4. Step 4: Simplify right side
    867,830.20x = 720,750,077,354.94
  5. Step 5: Solve for x
    x = 720,750,077,354.94/867,830.20
  6. Step 6: Final answer
    x = 830,519.70

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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.