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Finding the Fourth Proportional to 718,678.60, 991,774.48 and 412,774.84

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Solution

The fourth proportional to 718,678.60, 991,774.48 and 412,774.84 is: 569,628.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,678.60 : 991,774.48 = 412,774.84 : x
  2. Step 2: Convert to fraction form
    718,678.60/991,774.48 = 412,774.84/x
  3. Step 3: Cross multiply
    718,678.60x = 991,774.48 × 412,774.84
  4. Step 4: Simplify right side
    718,678.60x = 409,379,552,298.08
  5. Step 5: Solve for x
    x = 409,379,552,298.08/718,678.60
  6. Step 6: Final answer
    x = 569,628.14

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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.