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Finding the Fourth Proportional to 317,640.96, 438,312.24 and 190,313.28

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Solution

The fourth proportional to 317,640.96, 438,312.24 and 190,313.28 is: 262,612.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,640.96 : 438,312.24 = 190,313.28 : x
  2. Step 2: Convert to fraction form
    317,640.96/438,312.24 = 190,313.28/x
  3. Step 3: Cross multiply
    317,640.96x = 438,312.24 × 190,313.28
  4. Step 4: Simplify right side
    317,640.96x = 83,416,640,058.55
  5. Step 5: Solve for x
    x = 83,416,640,058.55/317,640.96
  6. Step 6: Final answer
    x = 262,612.98

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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.