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Finding the Fourth Proportional to 306,087.20, 459,130.80 and 257,098.40

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Solution

The fourth proportional to 306,087.20, 459,130.80 and 257,098.40 is: 385,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,087.20 : 459,130.80 = 257,098.40 : x
  2. Step 2: Convert to fraction form
    306,087.20/459,130.80 = 257,098.40/x
  3. Step 3: Cross multiply
    306,087.20x = 459,130.80 × 257,098.40
  4. Step 4: Simplify right side
    306,087.20x = 118,041,794,070.72
  5. Step 5: Solve for x
    x = 118,041,794,070.72/306,087.20
  6. Step 6: Final answer
    x = 385,647.60

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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.