Home / 811,281.60-1,216,807.20-278,827.20

Finding the Fourth Proportional to 811,281.60, 1,216,807.20 and 278,827.20

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Solution

The fourth proportional to 811,281.60, 1,216,807.20 and 278,827.20 is: 418,201.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,281.60 : 1,216,807.20 = 278,827.20 : x
  2. Step 2: Convert to fraction form
    811,281.60/1,216,807.20 = 278,827.20/x
  3. Step 3: Cross multiply
    811,281.60x = 1,216,807.20 × 278,827.20
  4. Step 4: Simplify right side
    811,281.60x = 339,278,944,515.84
  5. Step 5: Solve for x
    x = 339,278,944,515.84/811,281.60
  6. Step 6: Final answer
    x = 418,201.21

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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.