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Finding the Fourth Proportional to 667,392.51, 920,263.65 and 425,291.61

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Solution

The fourth proportional to 667,392.51, 920,263.65 and 425,291.61 is: 586,432.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,392.51 : 920,263.65 = 425,291.61 : x
  2. Step 2: Convert to fraction form
    667,392.51/920,263.65 = 425,291.61/x
  3. Step 3: Cross multiply
    667,392.51x = 920,263.65 × 425,291.61
  4. Step 4: Simplify right side
    667,392.51x = 391,380,409,332.98
  5. Step 5: Solve for x
    x = 391,380,409,332.98/667,392.51
  6. Step 6: Final answer
    x = 586,432.13

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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.