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Finding the Fourth Proportional to 485,551.72, 669,681.54 and 315,840.04

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Solution

The fourth proportional to 485,551.72, 669,681.54 and 315,840.04 is: 435,612.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,551.72 : 669,681.54 = 315,840.04 : x
  2. Step 2: Convert to fraction form
    485,551.72/669,681.54 = 315,840.04/x
  3. Step 3: Cross multiply
    485,551.72x = 669,681.54 × 315,840.04
  4. Step 4: Simplify right side
    485,551.72x = 211,512,244,380.86
  5. Step 5: Solve for x
    x = 211,512,244,380.86/485,551.72
  6. Step 6: Final answer
    x = 435,612.18

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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.