Home / 1,326,934.28-1,989,897-428,241.30

Finding the Fourth Proportional to 1,326,934.28, 1,989,897 and 428,241.30

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Solution

The fourth proportional to 1,326,934.28, 1,989,897 and 428,241.30 is: 642,199.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,934.28 : 1,989,897 = 428,241.30 : x
  2. Step 2: Convert to fraction form
    1,326,934.28/1,989,897 = 428,241.30/x
  3. Step 3: Cross multiply
    1,326,934.28x = 1,989,897 × 428,241.30
  4. Step 4: Simplify right side
    1,326,934.28x = 852,156,078,146.10
  5. Step 5: Solve for x
    x = 852,156,078,146.10/1,326,934.28
  6. Step 6: Final answer
    x = 642,199.16

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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.