Home / 578,830.40-867,079.20-389,873.60

Finding the Fourth Proportional to 578,830.40, 867,079.20 and 389,873.60

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Solution

The fourth proportional to 578,830.40, 867,079.20 and 389,873.60 is: 584,024.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,830.40 : 867,079.20 = 389,873.60 : x
  2. Step 2: Convert to fraction form
    578,830.40/867,079.20 = 389,873.60/x
  3. Step 3: Cross multiply
    578,830.40x = 867,079.20 × 389,873.60
  4. Step 4: Simplify right side
    578,830.40x = 338,051,289,189.12
  5. Step 5: Solve for x
    x = 338,051,289,189.12/578,830.40
  6. Step 6: Final answer
    x = 584,024.77

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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.