Home / 280,837.40-421,256.10-210,853.40

Finding the Fourth Proportional to 280,837.40, 421,256.10 and 210,853.40

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Solution

The fourth proportional to 280,837.40, 421,256.10 and 210,853.40 is: 316,280.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,837.40 : 421,256.10 = 210,853.40 : x
  2. Step 2: Convert to fraction form
    280,837.40/421,256.10 = 210,853.40/x
  3. Step 3: Cross multiply
    280,837.40x = 421,256.10 × 210,853.40
  4. Step 4: Simplify right side
    280,837.40x = 88,823,280,955.74
  5. Step 5: Solve for x
    x = 88,823,280,955.74/280,837.40
  6. Step 6: Final answer
    x = 316,280.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.