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Finding the Fourth Proportional to 556,003.82, 767,356.33 and 311,002.20

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Solution

The fourth proportional to 556,003.82, 767,356.33 and 311,002.20 is: 429,222.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,003.82 : 767,356.33 = 311,002.20 : x
  2. Step 2: Convert to fraction form
    556,003.82/767,356.33 = 311,002.20/x
  3. Step 3: Cross multiply
    556,003.82x = 767,356.33 × 311,002.20
  4. Step 4: Simplify right side
    556,003.82x = 238,649,506,813.93
  5. Step 5: Solve for x
    x = 238,649,506,813.93/556,003.82
  6. Step 6: Final answer
    x = 429,222.78

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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.