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Finding the Fourth Proportional to 522,068.90, 783,103.35 and 389,208.65

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Solution

The fourth proportional to 522,068.90, 783,103.35 and 389,208.65 is: 583,812.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,068.90 : 783,103.35 = 389,208.65 : x
  2. Step 2: Convert to fraction form
    522,068.90/783,103.35 = 389,208.65/x
  3. Step 3: Cross multiply
    522,068.90x = 783,103.35 × 389,208.65
  4. Step 4: Simplify right side
    522,068.90x = 304,790,597,663.98
  5. Step 5: Solve for x
    x = 304,790,597,663.98/522,068.90
  6. Step 6: Final answer
    x = 583,812.98

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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.