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Finding the Fourth Proportional to 611,458.20, 843,784.18 and 339,543.41

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Solution

The fourth proportional to 611,458.20, 843,784.18 and 339,543.41 is: 468,554.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,458.20 : 843,784.18 = 339,543.41 : x
  2. Step 2: Convert to fraction form
    611,458.20/843,784.18 = 339,543.41/x
  3. Step 3: Cross multiply
    611,458.20x = 843,784.18 × 339,543.41
  4. Step 4: Simplify right side
    611,458.20x = 286,501,352,713.47
  5. Step 5: Solve for x
    x = 286,501,352,713.47/611,458.20
  6. Step 6: Final answer
    x = 468,554.27

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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.