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Finding the Fourth Proportional to 642,230.40, 962,308.80 and 405,148.80

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Solution

The fourth proportional to 642,230.40, 962,308.80 and 405,148.80 is: 607,069.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,230.40 : 962,308.80 = 405,148.80 : x
  2. Step 2: Convert to fraction form
    642,230.40/962,308.80 = 405,148.80/x
  3. Step 3: Cross multiply
    642,230.40x = 962,308.80 × 405,148.80
  4. Step 4: Simplify right side
    642,230.40x = 389,878,255,549.44
  5. Step 5: Solve for x
    x = 389,878,255,549.44/642,230.40
  6. Step 6: Final answer
    x = 607,069.14

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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.