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Finding the Fourth Proportional to 305,323.20, 457,984.80 and 128,030.40

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Solution

The fourth proportional to 305,323.20, 457,984.80 and 128,030.40 is: 192,045.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,323.20 : 457,984.80 = 128,030.40 : x
  2. Step 2: Convert to fraction form
    305,323.20/457,984.80 = 128,030.40/x
  3. Step 3: Cross multiply
    305,323.20x = 457,984.80 × 128,030.40
  4. Step 4: Simplify right side
    305,323.20x = 58,635,977,137.92
  5. Step 5: Solve for x
    x = 58,635,977,137.92/305,323.20
  6. Step 6: Final answer
    x = 192,045.60

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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.