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Finding the Fourth Proportional to 421,354.92, 581,469.80 and 230,368.32

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Solution

The fourth proportional to 421,354.92, 581,469.80 and 230,368.32 is: 317,908.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,354.92 : 581,469.80 = 230,368.32 : x
  2. Step 2: Convert to fraction form
    421,354.92/581,469.80 = 230,368.32/x
  3. Step 3: Cross multiply
    421,354.92x = 581,469.80 × 230,368.32
  4. Step 4: Simplify right side
    421,354.92x = 133,952,220,956.74
  5. Step 5: Solve for x
    x = 133,952,220,956.74/421,354.92
  6. Step 6: Final answer
    x = 317,908.29

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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.