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Finding the Fourth Proportional to 719,436, 992,821.68 and 401,484

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Solution

The fourth proportional to 719,436, 992,821.68 and 401,484 is: 554,047.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,436 : 992,821.68 = 401,484 : x
  2. Step 2: Convert to fraction form
    719,436/992,821.68 = 401,484/x
  3. Step 3: Cross multiply
    719,436x = 992,821.68 × 401,484
  4. Step 4: Simplify right side
    719,436x = 398,602,019,373.12
  5. Step 5: Solve for x
    x = 398,602,019,373.12/719,436
  6. Step 6: Final answer
    x = 554,047.92

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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.