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Finding the Fourth Proportional to 786,607.20, 1,085,238 and 464,155.92

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Solution

The fourth proportional to 786,607.20, 1,085,238 and 464,155.92 is: 640,369.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,607.20 : 1,085,238 = 464,155.92 : x
  2. Step 2: Convert to fraction form
    786,607.20/1,085,238 = 464,155.92/x
  3. Step 3: Cross multiply
    786,607.20x = 1,085,238 × 464,155.92
  4. Step 4: Simplify right side
    786,607.20x = 503,719,642,308.96
  5. Step 5: Solve for x
    x = 503,719,642,308.96/786,607.20
  6. Step 6: Final answer
    x = 640,369.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.