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Finding the Fourth Proportional to 388,853.10, 583,279.65 and 122,695.20

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Solution

The fourth proportional to 388,853.10, 583,279.65 and 122,695.20 is: 184,042.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,853.10 : 583,279.65 = 122,695.20 : x
  2. Step 2: Convert to fraction form
    388,853.10/583,279.65 = 122,695.20/x
  3. Step 3: Cross multiply
    388,853.10x = 583,279.65 × 122,695.20
  4. Step 4: Simplify right side
    388,853.10x = 71,565,613,312.68
  5. Step 5: Solve for x
    x = 71,565,613,312.68/388,853.10
  6. Step 6: Final answer
    x = 184,042.80

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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.