Home / 778,125.60-1,165,307.40-644,018.76

Finding the Fourth Proportional to 778,125.60, 1,165,307.40 and 644,018.76

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Solution

The fourth proportional to 778,125.60, 1,165,307.40 and 644,018.76 is: 964,471.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,125.60 : 1,165,307.40 = 644,018.76 : x
  2. Step 2: Convert to fraction form
    778,125.60/1,165,307.40 = 644,018.76/x
  3. Step 3: Cross multiply
    778,125.60x = 1,165,307.40 × 644,018.76
  4. Step 4: Simplify right side
    778,125.60x = 750,479,826,766.82
  5. Step 5: Solve for x
    x = 750,479,826,766.82/778,125.60
  6. Step 6: Final answer
    x = 964,471.32

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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.