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Finding the Fourth Proportional to 719,315, 992,654.70 and 401,363

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Solution

The fourth proportional to 719,315, 992,654.70 and 401,363 is: 553,880.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,315 : 992,654.70 = 401,363 : x
  2. Step 2: Convert to fraction form
    719,315/992,654.70 = 401,363/x
  3. Step 3: Cross multiply
    719,315x = 992,654.70 × 401,363
  4. Step 4: Simplify right side
    719,315x = 398,414,868,356.10
  5. Step 5: Solve for x
    x = 398,414,868,356.10/719,315
  6. Step 6: Final answer
    x = 553,880.94

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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.