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Finding the Fourth Proportional to 369,421.60, 554,132.40 and 211,520.20

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Solution

The fourth proportional to 369,421.60, 554,132.40 and 211,520.20 is: 317,280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,421.60 : 554,132.40 = 211,520.20 : x
  2. Step 2: Convert to fraction form
    369,421.60/554,132.40 = 211,520.20/x
  3. Step 3: Cross multiply
    369,421.60x = 554,132.40 × 211,520.20
  4. Step 4: Simplify right side
    369,421.60x = 117,210,196,074.48
  5. Step 5: Solve for x
    x = 117,210,196,074.48/369,421.60
  6. Step 6: Final answer
    x = 317,280.30

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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.