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Finding the Fourth Proportional to 570,782.40, 787,636.36 and 316,128.12

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Solution

The fourth proportional to 570,782.40, 787,636.36 and 316,128.12 is: 436,232.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,782.40 : 787,636.36 = 316,128.12 : x
  2. Step 2: Convert to fraction form
    570,782.40/787,636.36 = 316,128.12/x
  3. Step 3: Cross multiply
    570,782.40x = 787,636.36 × 316,128.12
  4. Step 4: Simplify right side
    570,782.40x = 248,993,997,393.75
  5. Step 5: Solve for x
    x = 248,993,997,393.75/570,782.40
  6. Step 6: Final answer
    x = 436,232.79

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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.