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Finding the Fourth Proportional to 612,640.82, 917,080.21 and 554,904.02

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Solution

The fourth proportional to 612,640.82, 917,080.21 and 554,904.02 is: 830,652.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,640.82 : 917,080.21 = 554,904.02 : x
  2. Step 2: Convert to fraction form
    612,640.82/917,080.21 = 554,904.02/x
  3. Step 3: Cross multiply
    612,640.82x = 917,080.21 × 554,904.02
  4. Step 4: Simplify right side
    612,640.82x = 508,891,498,177.78
  5. Step 5: Solve for x
    x = 508,891,498,177.78/612,640.82
  6. Step 6: Final answer
    x = 830,652.28

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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.