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Finding the Fourth Proportional to 519,263.20, 778,894.80 and 203,730.40

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Solution

The fourth proportional to 519,263.20, 778,894.80 and 203,730.40 is: 305,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,263.20 : 778,894.80 = 203,730.40 : x
  2. Step 2: Convert to fraction form
    519,263.20/778,894.80 = 203,730.40/x
  3. Step 3: Cross multiply
    519,263.20x = 778,894.80 × 203,730.40
  4. Step 4: Simplify right side
    519,263.20x = 158,684,549,161.92
  5. Step 5: Solve for x
    x = 158,684,549,161.92/519,263.20
  6. Step 6: Final answer
    x = 305,595.60

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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.