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Finding the Fourth Proportional to 310,627.55, 428,490.86 and 186,416.77

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Solution

The fourth proportional to 310,627.55, 428,490.86 and 186,416.77 is: 257,150.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,627.55 : 428,490.86 = 186,416.77 : x
  2. Step 2: Convert to fraction form
    310,627.55/428,490.86 = 186,416.77/x
  3. Step 3: Cross multiply
    310,627.55x = 428,490.86 × 186,416.77
  4. Step 4: Simplify right side
    310,627.55x = 79,877,880,739.30
  5. Step 5: Solve for x
    x = 79,877,880,739.30/310,627.55
  6. Step 6: Final answer
    x = 257,150.02

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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.