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Finding the Fourth Proportional to 310,151.76, 428,431.86 and 243,018.18

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Solution

The fourth proportional to 310,151.76, 428,431.86 and 243,018.18 is: 335,696.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,151.76 : 428,431.86 = 243,018.18 : x
  2. Step 2: Convert to fraction form
    310,151.76/428,431.86 = 243,018.18/x
  3. Step 3: Cross multiply
    310,151.76x = 428,431.86 × 243,018.18
  4. Step 4: Simplify right side
    310,151.76x = 104,116,730,871.22
  5. Step 5: Solve for x
    x = 104,116,730,871.22/310,151.76
  6. Step 6: Final answer
    x = 335,696.08

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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.