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Finding the Fourth Proportional to 719,461.48, 992,830.79 and 397,164.64

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Solution

The fourth proportional to 719,461.48, 992,830.79 and 397,164.64 is: 548,072.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,461.48 : 992,830.79 = 397,164.64 : x
  2. Step 2: Convert to fraction form
    719,461.48/992,830.79 = 397,164.64/x
  3. Step 3: Cross multiply
    719,461.48x = 992,830.79 × 397,164.64
  4. Step 4: Simplify right side
    719,461.48x = 394,317,276,341.29
  5. Step 5: Solve for x
    x = 394,317,276,341.29/719,461.48
  6. Step 6: Final answer
    x = 548,072.82

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1.5x scale

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.