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Finding the Fourth Proportional to 315,313.34, 435,141.58 and 172,082.60

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Solution

The fourth proportional to 315,313.34, 435,141.58 and 172,082.60 is: 237,478.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,313.34 : 435,141.58 = 172,082.60 : x
  2. Step 2: Convert to fraction form
    315,313.34/435,141.58 = 172,082.60/x
  3. Step 3: Cross multiply
    315,313.34x = 435,141.58 × 172,082.60
  4. Step 4: Simplify right side
    315,313.34x = 74,880,294,454.51
  5. Step 5: Solve for x
    x = 74,880,294,454.51/315,313.34
  6. Step 6: Final answer
    x = 237,478.99

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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.