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Finding the Fourth Proportional to 385,544.60, 531,678.30 and 300,630.68

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Solution

The fourth proportional to 385,544.60, 531,678.30 and 300,630.68 is: 414,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,544.60 : 531,678.30 = 300,630.68 : x
  2. Step 2: Convert to fraction form
    385,544.60/531,678.30 = 300,630.68/x
  3. Step 3: Cross multiply
    385,544.60x = 531,678.30 × 300,630.68
  4. Step 4: Simplify right side
    385,544.60x = 159,838,808,870.24
  5. Step 5: Solve for x
    x = 159,838,808,870.24/385,544.60
  6. Step 6: Final answer
    x = 414,579.30

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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.