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Finding the Fourth Proportional to 516,455.28, 769,492.08 and 487,448.64

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Solution

The fourth proportional to 516,455.28, 769,492.08 and 487,448.64 is: 726,273.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,455.28 : 769,492.08 = 487,448.64 : x
  2. Step 2: Convert to fraction form
    516,455.28/769,492.08 = 487,448.64/x
  3. Step 3: Cross multiply
    516,455.28x = 769,492.08 × 487,448.64
  4. Step 4: Simplify right side
    516,455.28x = 375,087,867,886.77
  5. Step 5: Solve for x
    x = 375,087,867,886.77/516,455.28
  6. Step 6: Final answer
    x = 726,273.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.