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Finding the Fourth Proportional to 389,316.60, 584,205.30 and 256,580.60

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Solution

The fourth proportional to 389,316.60, 584,205.30 and 256,580.60 is: 385,022.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,316.60 : 584,205.30 = 256,580.60 : x
  2. Step 2: Convert to fraction form
    389,316.60/584,205.30 = 256,580.60/x
  3. Step 3: Cross multiply
    389,316.60x = 584,205.30 × 256,580.60
  4. Step 4: Simplify right side
    389,316.60x = 149,895,746,397.18
  5. Step 5: Solve for x
    x = 149,895,746,397.18/389,316.60
  6. Step 6: Final answer
    x = 385,022.75

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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.