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Finding the Fourth Proportional to 306,619, 423,140.70 and 172,483

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Solution

The fourth proportional to 306,619, 423,140.70 and 172,483 is: 238,030.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,619 : 423,140.70 = 172,483 : x
  2. Step 2: Convert to fraction form
    306,619/423,140.70 = 172,483/x
  3. Step 3: Cross multiply
    306,619x = 423,140.70 × 172,483
  4. Step 4: Simplify right side
    306,619x = 72,984,577,358.10
  5. Step 5: Solve for x
    x = 72,984,577,358.10/306,619
  6. Step 6: Final answer
    x = 238,030.19

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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.