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Finding the Fourth Proportional to 388,508.96, 536,158.90 and 216,426.72

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Solution

The fourth proportional to 388,508.96, 536,158.90 and 216,426.72 is: 298,678.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,508.96 : 536,158.90 = 216,426.72 : x
  2. Step 2: Convert to fraction form
    388,508.96/536,158.90 = 216,426.72/x
  3. Step 3: Cross multiply
    388,508.96x = 536,158.90 × 216,426.72
  4. Step 4: Simplify right side
    388,508.96x = 116,039,112,125.81
  5. Step 5: Solve for x
    x = 116,039,112,125.81/388,508.96
  6. Step 6: Final answer
    x = 298,678.08

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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.