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Finding the Fourth Proportional to 561,689.15, 775,131.06 and 303,565.34

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Solution

The fourth proportional to 561,689.15, 775,131.06 and 303,565.34 is: 418,920.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,689.15 : 775,131.06 = 303,565.34 : x
  2. Step 2: Convert to fraction form
    561,689.15/775,131.06 = 303,565.34/x
  3. Step 3: Cross multiply
    561,689.15x = 775,131.06 × 303,565.34
  4. Step 4: Simplify right side
    561,689.15x = 235,302,919,897.81
  5. Step 5: Solve for x
    x = 235,302,919,897.81/561,689.15
  6. Step 6: Final answer
    x = 418,920.18

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Double scale
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Similar ratio
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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.