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Finding the Fourth Proportional to 604,891.20, 907,336.80 and 289,963.20

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Solution

The fourth proportional to 604,891.20, 907,336.80 and 289,963.20 is: 434,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,891.20 : 907,336.80 = 289,963.20 : x
  2. Step 2: Convert to fraction form
    604,891.20/907,336.80 = 289,963.20/x
  3. Step 3: Cross multiply
    604,891.20x = 907,336.80 × 289,963.20
  4. Step 4: Simplify right side
    604,891.20x = 263,094,282,005.76
  5. Step 5: Solve for x
    x = 263,094,282,005.76/604,891.20
  6. Step 6: Final answer
    x = 434,944.80

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Double scale
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Similar ratio
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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.