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Finding the Fourth Proportional to 612,139.30, 917,312.55 and 548,959.30

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Solution

The fourth proportional to 612,139.30, 917,312.55 and 548,959.30 is: 822,635.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,139.30 : 917,312.55 = 548,959.30 : x
  2. Step 2: Convert to fraction form
    612,139.30/917,312.55 = 548,959.30/x
  3. Step 3: Cross multiply
    612,139.30x = 917,312.55 × 548,959.30
  4. Step 4: Simplify right side
    612,139.30x = 503,567,255,329.22
  5. Step 5: Solve for x
    x = 503,567,255,329.22/612,139.30
  6. Step 6: Final answer
    x = 822,635.07

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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.