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Finding the Fourth Proportional to 310,328.78, 428,254.08 and 176,192.78

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Solution

The fourth proportional to 310,328.78, 428,254.08 and 176,192.78 is: 243,146.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,328.78 : 428,254.08 = 176,192.78 : x
  2. Step 2: Convert to fraction form
    310,328.78/428,254.08 = 176,192.78/x
  3. Step 3: Cross multiply
    310,328.78x = 428,254.08 × 176,192.78
  4. Step 4: Simplify right side
    310,328.78x = 75,455,276,901.54
  5. Step 5: Solve for x
    x = 75,455,276,901.54/310,328.78
  6. Step 6: Final answer
    x = 243,146.24

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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.