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Finding the Fourth Proportional to 421,087.70, 581,115.35 and 230,113.40

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Solution

The fourth proportional to 421,087.70, 581,115.35 and 230,113.40 is: 317,564.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,087.70 : 581,115.35 = 230,113.40 : x
  2. Step 2: Convert to fraction form
    421,087.70/581,115.35 = 230,113.40/x
  3. Step 3: Cross multiply
    421,087.70x = 581,115.35 × 230,113.40
  4. Step 4: Simplify right side
    421,087.70x = 133,722,426,650.40
  5. Step 5: Solve for x
    x = 133,722,426,650.40/421,087.70
  6. Step 6: Final answer
    x = 317,564.31

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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.