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Finding the Fourth Proportional to 330,009.55, 455,420.42 and 186,769.69

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Solution

The fourth proportional to 330,009.55, 455,420.42 and 186,769.69 is: 257,746.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,009.55 : 455,420.42 = 186,769.69 : x
  2. Step 2: Convert to fraction form
    330,009.55/455,420.42 = 186,769.69/x
  3. Step 3: Cross multiply
    330,009.55x = 455,420.42 × 186,769.69
  4. Step 4: Simplify right side
    330,009.55x = 85,058,730,663.07
  5. Step 5: Solve for x
    x = 85,058,730,663.07/330,009.55
  6. Step 6: Final answer
    x = 257,746.27

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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.