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Finding the Fourth Proportional to 709,328.40, 1,063,805.40 and 354,080.40

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Solution

The fourth proportional to 709,328.40, 1,063,805.40 and 354,080.40 is: 531,027.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,328.40 : 1,063,805.40 = 354,080.40 : x
  2. Step 2: Convert to fraction form
    709,328.40/1,063,805.40 = 354,080.40/x
  3. Step 3: Cross multiply
    709,328.40x = 1,063,805.40 × 354,080.40
  4. Step 4: Simplify right side
    709,328.40x = 376,672,641,554.16
  5. Step 5: Solve for x
    x = 376,672,641,554.16/709,328.40
  6. Step 6: Final answer
    x = 531,027.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.