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Finding the Fourth Proportional to 679,964.12, 938,368 and 374,048.36

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Solution

The fourth proportional to 679,964.12, 938,368 and 374,048.36 is: 516,196.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,964.12 : 938,368 = 374,048.36 : x
  2. Step 2: Convert to fraction form
    679,964.12/938,368 = 374,048.36/x
  3. Step 3: Cross multiply
    679,964.12x = 938,368 × 374,048.36
  4. Step 4: Simplify right side
    679,964.12x = 350,995,011,476.48
  5. Step 5: Solve for x
    x = 350,995,011,476.48/679,964.12
  6. Step 6: Final answer
    x = 516,196.37

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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.