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Finding the Fourth Proportional to 554,478.45, 765,184.85 and 306,128.40

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Solution

The fourth proportional to 554,478.45, 765,184.85 and 306,128.40 is: 422,459.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,478.45 : 765,184.85 = 306,128.40 : x
  2. Step 2: Convert to fraction form
    554,478.45/765,184.85 = 306,128.40/x
  3. Step 3: Cross multiply
    554,478.45x = 765,184.85 × 306,128.40
  4. Step 4: Simplify right side
    554,478.45x = 234,244,812,304.10
  5. Step 5: Solve for x
    x = 234,244,812,304.10/554,478.45
  6. Step 6: Final answer
    x = 422,459.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.