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Finding the Fourth Proportional to 642,729.40, 965,130.90 and 433,295.80

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Solution

The fourth proportional to 642,729.40, 965,130.90 and 433,295.80 is: 650,642.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,729.40 : 965,130.90 = 433,295.80 : x
  2. Step 2: Convert to fraction form
    642,729.40/965,130.90 = 433,295.80/x
  3. Step 3: Cross multiply
    642,729.40x = 965,130.90 × 433,295.80
  4. Step 4: Simplify right side
    642,729.40x = 418,187,165,420.22
  5. Step 5: Solve for x
    x = 418,187,165,420.22/642,729.40
  6. Step 6: Final answer
    x = 650,642.66

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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.