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Finding the Fourth Proportional to 4,752.42, 7,129.95 and 1,980.40

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Solution

The fourth proportional to 4,752.42, 7,129.95 and 1,980.40 is: 2,971.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,752.42 : 7,129.95 = 1,980.40 : x
  2. Step 2: Convert to fraction form
    4,752.42/7,129.95 = 1,980.40/x
  3. Step 3: Cross multiply
    4,752.42x = 7,129.95 × 1,980.40
  4. Step 4: Simplify right side
    4,752.42x = 14,120,152.98
  5. Step 5: Solve for x
    x = 14,120,152.98/4,752.42
  6. Step 6: Final answer
    x = 2,971.15

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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.