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Finding the Fourth Proportional to 211,488.80, 317,253.36 and 71,290.40

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Solution

The fourth proportional to 211,488.80, 317,253.36 and 71,290.40 is: 106,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,488.80 : 317,253.36 = 71,290.40 : x
  2. Step 2: Convert to fraction form
    211,488.80/317,253.36 = 71,290.40/x
  3. Step 3: Cross multiply
    211,488.80x = 317,253.36 × 71,290.40
  4. Step 4: Simplify right side
    211,488.80x = 22,617,118,935.74
  5. Step 5: Solve for x
    x = 22,617,118,935.74/211,488.80
  6. Step 6: Final answer
    x = 106,942.40

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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.