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Finding the Fourth Proportional to 208,031.80, 312,047.70 and 155,543.80

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Solution

The fourth proportional to 208,031.80, 312,047.70 and 155,543.80 is: 233,315.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,031.80 : 312,047.70 = 155,543.80 : x
  2. Step 2: Convert to fraction form
    208,031.80/312,047.70 = 155,543.80/x
  3. Step 3: Cross multiply
    208,031.80x = 312,047.70 × 155,543.80
  4. Step 4: Simplify right side
    208,031.80x = 48,537,085,039.26
  5. Step 5: Solve for x
    x = 48,537,085,039.26/208,031.80
  6. Step 6: Final answer
    x = 233,315.70

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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.