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Finding the Fourth Proportional to 306,039.90, 459,059.85 and 216,810.30

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Solution

The fourth proportional to 306,039.90, 459,059.85 and 216,810.30 is: 325,215.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,039.90 : 459,059.85 = 216,810.30 : x
  2. Step 2: Convert to fraction form
    306,039.90/459,059.85 = 216,810.30/x
  3. Step 3: Cross multiply
    306,039.90x = 459,059.85 × 216,810.30
  4. Step 4: Simplify right side
    306,039.90x = 99,528,903,796.46
  5. Step 5: Solve for x
    x = 99,528,903,796.46/306,039.90
  6. Step 6: Final answer
    x = 325,215.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.