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Finding the Fourth Proportional to 256,881.70, 360,421.70 and 256,881.70

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Solution

The fourth proportional to 256,881.70, 360,421.70 and 256,881.70 is: 360,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,881.70 : 360,421.70 = 256,881.70 : x
  2. Step 2: Convert to fraction form
    256,881.70/360,421.70 = 256,881.70/x
  3. Step 3: Cross multiply
    256,881.70x = 360,421.70 × 256,881.70
  4. Step 4: Simplify right side
    256,881.70x = 92,585,739,012.89
  5. Step 5: Solve for x
    x = 92,585,739,012.89/256,881.70
  6. Step 6: Final answer
    x = 360,421.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.