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Finding the Fourth Proportional to 556,815.66, 768,407.76 and 302,166.78

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Solution

The fourth proportional to 556,815.66, 768,407.76 and 302,166.78 is: 416,991.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,815.66 : 768,407.76 = 302,166.78 : x
  2. Step 2: Convert to fraction form
    556,815.66/768,407.76 = 302,166.78/x
  3. Step 3: Cross multiply
    556,815.66x = 768,407.76 × 302,166.78
  4. Step 4: Simplify right side
    556,815.66x = 232,187,298,566.21
  5. Step 5: Solve for x
    x = 232,187,298,566.21/556,815.66
  6. Step 6: Final answer
    x = 416,991.32

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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.