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Finding the Fourth Proportional to 668,027.28, 921,459.34 and 438,596.40

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Solution

The fourth proportional to 668,027.28, 921,459.34 and 438,596.40 is: 604,988.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,027.28 : 921,459.34 = 438,596.40 : x
  2. Step 2: Convert to fraction form
    668,027.28/921,459.34 = 438,596.40/x
  3. Step 3: Cross multiply
    668,027.28x = 921,459.34 × 438,596.40
  4. Step 4: Simplify right side
    668,027.28x = 404,148,749,270.38
  5. Step 5: Solve for x
    x = 404,148,749,270.38/668,027.28
  6. Step 6: Final answer
    x = 604,988.39

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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.