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Finding the Fourth Proportional to 578,434.34, 866,521.54 and 398,487.98

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Solution

The fourth proportional to 578,434.34, 866,521.54 and 398,487.98 is: 596,953.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,434.34 : 866,521.54 = 398,487.98 : x
  2. Step 2: Convert to fraction form
    578,434.34/866,521.54 = 398,487.98/x
  3. Step 3: Cross multiply
    578,434.34x = 866,521.54 × 398,487.98
  4. Step 4: Simplify right side
    578,434.34x = 345,298,418,101.09
  5. Step 5: Solve for x
    x = 345,298,418,101.09/578,434.34
  6. Step 6: Final answer
    x = 596,953.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.