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Finding the Fourth Proportional to 281,210.40, 388,070.28 and 153,885.96

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Solution

The fourth proportional to 281,210.40, 388,070.28 and 153,885.96 is: 212,362.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,210.40 : 388,070.28 = 153,885.96 : x
  2. Step 2: Convert to fraction form
    281,210.40/388,070.28 = 153,885.96/x
  3. Step 3: Cross multiply
    281,210.40x = 388,070.28 × 153,885.96
  4. Step 4: Simplify right side
    281,210.40x = 59,718,567,585.27
  5. Step 5: Solve for x
    x = 59,718,567,585.27/281,210.40
  6. Step 6: Final answer
    x = 212,362.59

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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.