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Finding the Fourth Proportional to 578,503.55, 798,338.03 and 320,388.95

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Solution

The fourth proportional to 578,503.55, 798,338.03 and 320,388.95 is: 442,138.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,503.55 : 798,338.03 = 320,388.95 : x
  2. Step 2: Convert to fraction form
    578,503.55/798,338.03 = 320,388.95/x
  3. Step 3: Cross multiply
    578,503.55x = 798,338.03 × 320,388.95
  4. Step 4: Simplify right side
    578,503.55x = 255,778,677,583.13
  5. Step 5: Solve for x
    x = 255,778,677,583.13/578,503.55
  6. Step 6: Final answer
    x = 442,138.48

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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.