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Finding the Fourth Proportional to 570,863.80, 787,758.24 and 312,689.28

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Solution

The fourth proportional to 570,863.80, 787,758.24 and 312,689.28 is: 431,492.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,863.80 : 787,758.24 = 312,689.28 : x
  2. Step 2: Convert to fraction form
    570,863.80/787,758.24 = 312,689.28/x
  3. Step 3: Cross multiply
    570,863.80x = 787,758.24 × 312,689.28
  4. Step 4: Simplify right side
    570,863.80x = 246,323,556,879.67
  5. Step 5: Solve for x
    x = 246,323,556,879.67/570,863.80
  6. Step 6: Final answer
    x = 431,492.69

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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.