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Finding the Fourth Proportional to 448,780.60, 619,374.80 and 257,830.90

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Solution

The fourth proportional to 448,780.60, 619,374.80 and 257,830.90 is: 355,839.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,780.60 : 619,374.80 = 257,830.90 : x
  2. Step 2: Convert to fraction form
    448,780.60/619,374.80 = 257,830.90/x
  3. Step 3: Cross multiply
    448,780.60x = 619,374.80 × 257,830.90
  4. Step 4: Simplify right side
    448,780.60x = 159,693,961,217.46
  5. Step 5: Solve for x
    x = 159,693,961,217.46/448,780.60
  6. Step 6: Final answer
    x = 355,839.71

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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.