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Finding the Fourth Proportional to 318,865.42, 439,969.80 and 242,364.16

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Solution

The fourth proportional to 318,865.42, 439,969.80 and 242,364.16 is: 334,413.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,865.42 : 439,969.80 = 242,364.16 : x
  2. Step 2: Convert to fraction form
    318,865.42/439,969.80 = 242,364.16/x
  3. Step 3: Cross multiply
    318,865.42x = 439,969.80 × 242,364.16
  4. Step 4: Simplify right side
    318,865.42x = 106,632,911,002.37
  5. Step 5: Solve for x
    x = 106,632,911,002.37/318,865.42
  6. Step 6: Final answer
    x = 334,413.53

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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.