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Finding the Fourth Proportional to 642,090.64, 886,009.12 and 370,247.85

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Solution

The fourth proportional to 642,090.64, 886,009.12 and 370,247.85 is: 510,898.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,090.64 : 886,009.12 = 370,247.85 : x
  2. Step 2: Convert to fraction form
    642,090.64/886,009.12 = 370,247.85/x
  3. Step 3: Cross multiply
    642,090.64x = 886,009.12 × 370,247.85
  4. Step 4: Simplify right side
    642,090.64x = 328,042,971,760.39
  5. Step 5: Solve for x
    x = 328,042,971,760.39/642,090.64
  6. Step 6: Final answer
    x = 510,898.23

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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.