Home / 778,382.79-1,074,143.87-456,307.39

Finding the Fourth Proportional to 778,382.79, 1,074,143.87 and 456,307.39

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Solution

The fourth proportional to 778,382.79, 1,074,143.87 and 456,307.39 is: 629,689.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,382.79 : 1,074,143.87 = 456,307.39 : x
  2. Step 2: Convert to fraction form
    778,382.79/1,074,143.87 = 456,307.39/x
  3. Step 3: Cross multiply
    778,382.79x = 1,074,143.87 × 456,307.39
  4. Step 4: Simplify right side
    778,382.79x = 490,139,783,522.66
  5. Step 5: Solve for x
    x = 490,139,783,522.66/778,382.79
  6. Step 6: Final answer
    x = 629,689.91

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1.5x scale

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.