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Finding the Fourth Proportional to 387,220.69, 534,149.40 and 359,820.62

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Solution

The fourth proportional to 387,220.69, 534,149.40 and 359,820.62 is: 496,352.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,220.69 : 534,149.40 = 359,820.62 : x
  2. Step 2: Convert to fraction form
    387,220.69/534,149.40 = 359,820.62/x
  3. Step 3: Cross multiply
    387,220.69x = 534,149.40 × 359,820.62
  4. Step 4: Simplify right side
    387,220.69x = 192,197,968,280.63
  5. Step 5: Solve for x
    x = 192,197,968,280.63/387,220.69
  6. Step 6: Final answer
    x = 496,352.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.