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Finding the Fourth Proportional to 4,752.90, 7,129.35 and 1,980.07

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Solution

The fourth proportional to 4,752.90, 7,129.35 and 1,980.07 is: 2,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,752.90 : 7,129.35 = 1,980.07 : x
  2. Step 2: Convert to fraction form
    4,752.90/7,129.35 = 1,980.07/x
  3. Step 3: Cross multiply
    4,752.90x = 7,129.35 × 1,980.07
  4. Step 4: Simplify right side
    4,752.90x = 14,116,594.23
  5. Step 5: Solve for x
    x = 14,116,594.23/4,752.90
  6. Step 6: Final answer
    x = 2,970.10

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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.