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Finding the Fourth Proportional to 310,300.88, 428,220.88 and 172,492.74

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Solution

The fourth proportional to 310,300.88, 428,220.88 and 172,492.74 is: 238,043.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,300.88 : 428,220.88 = 172,492.74 : x
  2. Step 2: Convert to fraction form
    310,300.88/428,220.88 = 172,492.74/x
  3. Step 3: Cross multiply
    310,300.88x = 428,220.88 × 172,492.74
  4. Step 4: Simplify right side
    310,300.88x = 73,864,992,485.18
  5. Step 5: Solve for x
    x = 73,864,992,485.18/310,300.88
  6. Step 6: Final answer
    x = 238,043.13

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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.