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Finding the Fourth Proportional to 556,372.30, 767,712.96 and 311,355.86

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Solution

The fourth proportional to 556,372.30, 767,712.96 and 311,355.86 is: 429,625.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,372.30 : 767,712.96 = 311,355.86 : x
  2. Step 2: Convert to fraction form
    556,372.30/767,712.96 = 311,355.86/x
  3. Step 3: Cross multiply
    556,372.30x = 767,712.96 × 311,355.86
  4. Step 4: Simplify right side
    556,372.30x = 239,031,928,893.95
  5. Step 5: Solve for x
    x = 239,031,928,893.95/556,372.30
  6. Step 6: Final answer
    x = 429,625.86

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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.