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Finding the Fourth Proportional to 399,622.78, 596,518.98 and 349,176.88

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Solution

The fourth proportional to 399,622.78, 596,518.98 and 349,176.88 is: 521,218.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,622.78 : 596,518.98 = 349,176.88 : x
  2. Step 2: Convert to fraction form
    399,622.78/596,518.98 = 349,176.88/x
  3. Step 3: Cross multiply
    399,622.78x = 596,518.98 × 349,176.88
  4. Step 4: Simplify right side
    399,622.78x = 208,290,636,297.18
  5. Step 5: Solve for x
    x = 208,290,636,297.18/399,622.78
  6. Step 6: Final answer
    x = 521,218.13

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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.