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Finding the Fourth Proportional to 388,999.70, 584,374.35 and 374,128.10

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Solution

The fourth proportional to 388,999.70, 584,374.35 and 374,128.10 is: 562,033.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,999.70 : 584,374.35 = 374,128.10 : x
  2. Step 2: Convert to fraction form
    388,999.70/584,374.35 = 374,128.10/x
  3. Step 3: Cross multiply
    388,999.70x = 584,374.35 × 374,128.10
  4. Step 4: Simplify right side
    388,999.70x = 218,630,865,254.24
  5. Step 5: Solve for x
    x = 218,630,865,254.24/388,999.70
  6. Step 6: Final answer
    x = 562,033.51

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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.