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Finding the Fourth Proportional to 369,419.60, 554,129.40 and 211,518.20

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Solution

The fourth proportional to 369,419.60, 554,129.40 and 211,518.20 is: 317,277.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,419.60 : 554,129.40 = 211,518.20 : x
  2. Step 2: Convert to fraction form
    369,419.60/554,129.40 = 211,518.20/x
  3. Step 3: Cross multiply
    369,419.60x = 554,129.40 × 211,518.20
  4. Step 4: Simplify right side
    369,419.60x = 117,208,453,255.08
  5. Step 5: Solve for x
    x = 117,208,453,255.08/369,419.60
  6. Step 6: Final answer
    x = 317,277.30

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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.