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Finding the Fourth Proportional to 641,728.40, 885,606 and 369,775.40

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Solution

The fourth proportional to 641,728.40, 885,606 and 369,775.40 is: 510,302.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,728.40 : 885,606 = 369,775.40 : x
  2. Step 2: Convert to fraction form
    641,728.40/885,606 = 369,775.40/x
  3. Step 3: Cross multiply
    641,728.40x = 885,606 × 369,775.40
  4. Step 4: Simplify right side
    641,728.40x = 327,475,312,892.40
  5. Step 5: Solve for x
    x = 327,475,312,892.40/641,728.40
  6. Step 6: Final answer
    x = 510,302.04

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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.