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Finding the Fourth Proportional to 317,809.40, 438,639.51 and 180,012.98

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Solution

The fourth proportional to 317,809.40, 438,639.51 and 180,012.98 is: 248,453.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,809.40 : 438,639.51 = 180,012.98 : x
  2. Step 2: Convert to fraction form
    317,809.40/438,639.51 = 180,012.98/x
  3. Step 3: Cross multiply
    317,809.40x = 438,639.51 × 180,012.98
  4. Step 4: Simplify right side
    317,809.40x = 78,960,805,340.84
  5. Step 5: Solve for x
    x = 78,960,805,340.84/317,809.40
  6. Step 6: Final answer
    x = 248,453.34

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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.