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Finding the Fourth Proportional to 459,695.70, 689,543.55 and 127,271.70

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Solution

The fourth proportional to 459,695.70, 689,543.55 and 127,271.70 is: 190,907.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,695.70 : 689,543.55 = 127,271.70 : x
  2. Step 2: Convert to fraction form
    459,695.70/689,543.55 = 127,271.70/x
  3. Step 3: Cross multiply
    459,695.70x = 689,543.55 × 127,271.70
  4. Step 4: Simplify right side
    459,695.70x = 87,759,379,832.54
  5. Step 5: Solve for x
    x = 87,759,379,832.54/459,695.70
  6. Step 6: Final answer
    x = 190,907.55

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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.