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Finding the Fourth Proportional to 281,369.47, 388,326.85 and 160,483.05

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Solution

The fourth proportional to 281,369.47, 388,326.85 and 160,483.05 is: 221,487.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,369.47 : 388,326.85 = 160,483.05 : x
  2. Step 2: Convert to fraction form
    281,369.47/388,326.85 = 160,483.05/x
  3. Step 3: Cross multiply
    281,369.47x = 388,326.85 × 160,483.05
  4. Step 4: Simplify right side
    281,369.47x = 62,319,875,343.26
  5. Step 5: Solve for x
    x = 62,319,875,343.26/281,369.47
  6. Step 6: Final answer
    x = 221,487.69

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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.