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Finding the Fourth Proportional to 645,937.74, 891,376.11 and 359,467.98

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Solution

The fourth proportional to 645,937.74, 891,376.11 and 359,467.98 is: 496,055.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,937.74 : 891,376.11 = 359,467.98 : x
  2. Step 2: Convert to fraction form
    645,937.74/891,376.11 = 359,467.98/x
  3. Step 3: Cross multiply
    645,937.74x = 891,376.11 × 359,467.98
  4. Step 4: Simplify right side
    645,937.74x = 320,421,169,681.96
  5. Step 5: Solve for x
    x = 320,421,169,681.96/645,937.74
  6. Step 6: Final answer
    x = 496,055.81

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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.