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Finding the Fourth Proportional to 389,802.55, 538,443.77 and 313,608.68

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Solution

The fourth proportional to 389,802.55, 538,443.77 and 313,608.68 is: 433,195.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,802.55 : 538,443.77 = 313,608.68 : x
  2. Step 2: Convert to fraction form
    389,802.55/538,443.77 = 313,608.68/x
  3. Step 3: Cross multiply
    389,802.55x = 538,443.77 × 313,608.68
  4. Step 4: Simplify right side
    389,802.55x = 168,860,639,963.92
  5. Step 5: Solve for x
    x = 168,860,639,963.92/389,802.55
  6. Step 6: Final answer
    x = 433,195.32

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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.