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Finding the Fourth Proportional to 989,294, 1,365,225.90 and 559,564.88

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Solution

The fourth proportional to 989,294, 1,365,225.90 and 559,564.88 is: 772,199.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,294 : 1,365,225.90 = 559,564.88 : x
  2. Step 2: Convert to fraction form
    989,294/1,365,225.90 = 559,564.88/x
  3. Step 3: Cross multiply
    989,294x = 1,365,225.90 × 559,564.88
  4. Step 4: Simplify right side
    989,294x = 763,932,466,906.39
  5. Step 5: Solve for x
    x = 763,932,466,906.39/989,294
  6. Step 6: Final answer
    x = 772,199.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.