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Finding the Fourth Proportional to 642,076.40, 961,271.40 and 623,644.40

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Solution

The fourth proportional to 642,076.40, 961,271.40 and 623,644.40 is: 933,676.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,076.40 : 961,271.40 = 623,644.40 : x
  2. Step 2: Convert to fraction form
    642,076.40/961,271.40 = 623,644.40/x
  3. Step 3: Cross multiply
    642,076.40x = 961,271.40 × 623,644.40
  4. Step 4: Simplify right side
    642,076.40x = 599,491,525,490.16
  5. Step 5: Solve for x
    x = 599,491,525,490.16/642,076.40
  6. Step 6: Final answer
    x = 933,676.31

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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.