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Finding the Fourth Proportional to 564,771.58, 779,385.72 and 310,138.90

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Solution

The fourth proportional to 564,771.58, 779,385.72 and 310,138.90 is: 427,992.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,771.58 : 779,385.72 = 310,138.90 : x
  2. Step 2: Convert to fraction form
    564,771.58/779,385.72 = 310,138.90/x
  3. Step 3: Cross multiply
    564,771.58x = 779,385.72 × 310,138.90
  4. Step 4: Simplify right side
    564,771.58x = 241,717,829,876.51
  5. Step 5: Solve for x
    x = 241,717,829,876.51/564,771.58
  6. Step 6: Final answer
    x = 427,992.20

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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.