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Finding the Fourth Proportional to 421,028.75, 581,012.90 and 230,038.04

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Solution

The fourth proportional to 421,028.75, 581,012.90 and 230,038.04 is: 317,448.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,028.75 : 581,012.90 = 230,038.04 : x
  2. Step 2: Convert to fraction form
    421,028.75/581,012.90 = 230,038.04/x
  3. Step 3: Cross multiply
    421,028.75x = 581,012.90 × 230,038.04
  4. Step 4: Simplify right side
    421,028.75x = 133,655,069,895.70
  5. Step 5: Solve for x
    x = 133,655,069,895.70/421,028.75
  6. Step 6: Final answer
    x = 317,448.79

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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.