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Finding the Fourth Proportional to 576,412.40, 865,130.60 and 339,458.80

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Solution

The fourth proportional to 576,412.40, 865,130.60 and 339,458.80 is: 509,489.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,412.40 : 865,130.60 = 339,458.80 : x
  2. Step 2: Convert to fraction form
    576,412.40/865,130.60 = 339,458.80/x
  3. Step 3: Cross multiply
    576,412.40x = 865,130.60 × 339,458.80
  4. Step 4: Simplify right side
    576,412.40x = 293,676,195,319.28
  5. Step 5: Solve for x
    x = 293,676,195,319.28/576,412.40
  6. Step 6: Final answer
    x = 509,489.73

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1.5x scale

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.