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Finding the Fourth Proportional to 492,491.57, 679,744.04 and 311,088.13

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Solution

The fourth proportional to 492,491.57, 679,744.04 and 311,088.13 is: 429,368.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,491.57 : 679,744.04 = 311,088.13 : x
  2. Step 2: Convert to fraction form
    492,491.57/679,744.04 = 311,088.13/x
  3. Step 3: Cross multiply
    492,491.57x = 679,744.04 × 311,088.13
  4. Step 4: Simplify right side
    492,491.57x = 211,460,299,027.45
  5. Step 5: Solve for x
    x = 211,460,299,027.45/492,491.57
  6. Step 6: Final answer
    x = 429,368.37

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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.