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Finding the Fourth Proportional to 319,004.80, 478,276.80 and 178,806.40

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Solution

The fourth proportional to 319,004.80, 478,276.80 and 178,806.40 is: 268,080.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,004.80 : 478,276.80 = 178,806.40 : x
  2. Step 2: Convert to fraction form
    319,004.80/478,276.80 = 178,806.40/x
  3. Step 3: Cross multiply
    319,004.80x = 478,276.80 × 178,806.40
  4. Step 4: Simplify right side
    319,004.80x = 85,518,952,811.52
  5. Step 5: Solve for x
    x = 85,518,952,811.52/319,004.80
  6. Step 6: Final answer
    x = 268,080.46

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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.