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Finding the Fourth Proportional to 707,905.04, 976,910.28 and 421,435.04

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Solution

The fourth proportional to 707,905.04, 976,910.28 and 421,435.04 is: 581,581.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,905.04 : 976,910.28 = 421,435.04 : x
  2. Step 2: Convert to fraction form
    707,905.04/976,910.28 = 421,435.04/x
  3. Step 3: Cross multiply
    707,905.04x = 976,910.28 × 421,435.04
  4. Step 4: Simplify right side
    707,905.04x = 411,704,222,928.21
  5. Step 5: Solve for x
    x = 411,704,222,928.21/707,905.04
  6. Step 6: Final answer
    x = 581,581.14

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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.