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Finding the Fourth Proportional to 388,507.96, 536,157.52 and 216,425.72

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Solution

The fourth proportional to 388,507.96, 536,157.52 and 216,425.72 is: 298,676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,507.96 : 536,157.52 = 216,425.72 : x
  2. Step 2: Convert to fraction form
    388,507.96/536,157.52 = 216,425.72/x
  3. Step 3: Cross multiply
    388,507.96x = 536,157.52 × 216,425.72
  4. Step 4: Simplify right side
    388,507.96x = 116,038,277,299.41
  5. Step 5: Solve for x
    x = 116,038,277,299.41/388,507.96
  6. Step 6: Final answer
    x = 298,676.70

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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.