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Finding the Fourth Proportional to 442,698.71, 660,595.44 and 394,985.89

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Solution

The fourth proportional to 442,698.71, 660,595.44 and 394,985.89 is: 589,398.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,698.71 : 660,595.44 = 394,985.89 : x
  2. Step 2: Convert to fraction form
    442,698.71/660,595.44 = 394,985.89/x
  3. Step 3: Cross multiply
    442,698.71x = 660,595.44 × 394,985.89
  4. Step 4: Simplify right side
    442,698.71x = 260,925,877,505.16
  5. Step 5: Solve for x
    x = 260,925,877,505.16/442,698.71
  6. Step 6: Final answer
    x = 589,398.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.