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Finding the Fourth Proportional to 421,054.16, 626,165.98 and 407,764.76

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Solution

The fourth proportional to 421,054.16, 626,165.98 and 407,764.76 is: 606,402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,054.16 : 626,165.98 = 407,764.76 : x
  2. Step 2: Convert to fraction form
    421,054.16/626,165.98 = 407,764.76/x
  3. Step 3: Cross multiply
    421,054.16x = 626,165.98 × 407,764.76
  4. Step 4: Simplify right side
    421,054.16x = 255,328,420,554.87
  5. Step 5: Solve for x
    x = 255,328,420,554.87/421,054.16
  6. Step 6: Final answer
    x = 606,402.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.