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Finding the Fourth Proportional to 692,174.48, 955,257 and 390,431.12

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Solution

The fourth proportional to 692,174.48, 955,257 and 390,431.12 is: 538,826.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,174.48 : 955,257 = 390,431.12 : x
  2. Step 2: Convert to fraction form
    692,174.48/955,257 = 390,431.12/x
  3. Step 3: Cross multiply
    692,174.48x = 955,257 × 390,431.12
  4. Step 4: Simplify right side
    692,174.48x = 372,962,060,397.84
  5. Step 5: Solve for x
    x = 372,962,060,397.84/692,174.48
  6. Step 6: Final answer
    x = 538,826.66

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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.