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Finding the Fourth Proportional to 439,612.60, 657,669.30 and 381,098.20

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Solution

The fourth proportional to 439,612.60, 657,669.30 and 381,098.20 is: 570,130.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,612.60 : 657,669.30 = 381,098.20 : x
  2. Step 2: Convert to fraction form
    439,612.60/657,669.30 = 381,098.20/x
  3. Step 3: Cross multiply
    439,612.60x = 657,669.30 × 381,098.20
  4. Step 4: Simplify right side
    439,612.60x = 250,636,586,425.26
  5. Step 5: Solve for x
    x = 250,636,586,425.26/439,612.60
  6. Step 6: Final answer
    x = 570,130.58

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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.