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Finding the Fourth Proportional to 725,000.76, 1,000,458 and 402,702.84

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Solution

The fourth proportional to 725,000.76, 1,000,458 and 402,702.84 is: 555,706.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,000.76 : 1,000,458 = 402,702.84 : x
  2. Step 2: Convert to fraction form
    725,000.76/1,000,458 = 402,702.84/x
  3. Step 3: Cross multiply
    725,000.76x = 1,000,458 × 402,702.84
  4. Step 4: Simplify right side
    725,000.76x = 402,887,277,900.72
  5. Step 5: Solve for x
    x = 402,887,277,900.72/725,000.76
  6. Step 6: Final answer
    x = 555,706.01

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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.