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Finding the Fourth Proportional to 306,030.40, 459,142.80 and 137,485.60

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Solution

The fourth proportional to 306,030.40, 459,142.80 and 137,485.60 is: 206,272.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,030.40 : 459,142.80 = 137,485.60 : x
  2. Step 2: Convert to fraction form
    306,030.40/459,142.80 = 137,485.60/x
  3. Step 3: Cross multiply
    306,030.40x = 459,142.80 × 137,485.60
  4. Step 4: Simplify right side
    306,030.40x = 63,125,523,343.68
  5. Step 5: Solve for x
    x = 63,125,523,343.68/306,030.40
  6. Step 6: Final answer
    x = 206,272.07

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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.