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Finding the Fourth Proportional to 641,955.84, 885,861.12 and 355,459.84

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Solution

The fourth proportional to 641,955.84, 885,861.12 and 355,459.84 is: 490,513.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,955.84 : 885,861.12 = 355,459.84 : x
  2. Step 2: Convert to fraction form
    641,955.84/885,861.12 = 355,459.84/x
  3. Step 3: Cross multiply
    641,955.84x = 885,861.12 × 355,459.84
  4. Step 4: Simplify right side
    641,955.84x = 314,888,051,977.42
  5. Step 5: Solve for x
    x = 314,888,051,977.42/641,955.84
  6. Step 6: Final answer
    x = 490,513.57

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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.