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Finding the Fourth Proportional to 556,370.29, 767,710.20 and 311,353.86

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Solution

The fourth proportional to 556,370.29, 767,710.20 and 311,353.86 is: 429,623.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,370.29 : 767,710.20 = 311,353.86 : x
  2. Step 2: Convert to fraction form
    556,370.29/767,710.20 = 311,353.86/x
  3. Step 3: Cross multiply
    556,370.29x = 767,710.20 × 311,353.86
  4. Step 4: Simplify right side
    556,370.29x = 239,029,534,131.37
  5. Step 5: Solve for x
    x = 239,029,534,131.37/556,370.29
  6. Step 6: Final answer
    x = 429,623.11

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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.