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Finding the Fourth Proportional to 342,643.50, 513,965.25 and 93,325.50

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Solution

The fourth proportional to 342,643.50, 513,965.25 and 93,325.50 is: 139,988.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,643.50 : 513,965.25 = 93,325.50 : x
  2. Step 2: Convert to fraction form
    342,643.50/513,965.25 = 93,325.50/x
  3. Step 3: Cross multiply
    342,643.50x = 513,965.25 × 93,325.50
  4. Step 4: Simplify right side
    342,643.50x = 47,966,063,938.88
  5. Step 5: Solve for x
    x = 47,966,063,938.88/342,643.50
  6. Step 6: Final answer
    x = 139,988.25

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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.