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Finding the Fourth Proportional to 687,534.78, 948,779.87 and 381,610.39

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Solution

The fourth proportional to 687,534.78, 948,779.87 and 381,610.39 is: 526,612.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,534.78 : 948,779.87 = 381,610.39 : x
  2. Step 2: Convert to fraction form
    687,534.78/948,779.87 = 381,610.39/x
  3. Step 3: Cross multiply
    687,534.78x = 948,779.87 × 381,610.39
  4. Step 4: Simplify right side
    687,534.78x = 362,064,254,796.93
  5. Step 5: Solve for x
    x = 362,064,254,796.93/687,534.78
  6. Step 6: Final answer
    x = 526,612.28

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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.