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Finding the Fourth Proportional to 665,780.80, 998,800.80 and 286,700.80

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Solution

The fourth proportional to 665,780.80, 998,800.80 and 286,700.80 is: 430,107.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,780.80 : 998,800.80 = 286,700.80 : x
  2. Step 2: Convert to fraction form
    665,780.80/998,800.80 = 286,700.80/x
  3. Step 3: Cross multiply
    665,780.80x = 998,800.80 × 286,700.80
  4. Step 4: Simplify right side
    665,780.80x = 286,356,988,400.64
  5. Step 5: Solve for x
    x = 286,356,988,400.64/665,780.80
  6. Step 6: Final answer
    x = 430,107.01

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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.