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Finding the Fourth Proportional to 318,987.84, 440,386.48 and 211,703.34

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Solution

The fourth proportional to 318,987.84, 440,386.48 and 211,703.34 is: 292,272.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,987.84 : 440,386.48 = 211,703.34 : x
  2. Step 2: Convert to fraction form
    318,987.84/440,386.48 = 211,703.34/x
  3. Step 3: Cross multiply
    318,987.84x = 440,386.48 × 211,703.34
  4. Step 4: Simplify right side
    318,987.84x = 93,231,288,706.84
  5. Step 5: Solve for x
    x = 93,231,288,706.84/318,987.84
  6. Step 6: Final answer
    x = 292,272.23

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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.