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Finding the Fourth Proportional to 571,391.28, 788,466.96 and 316,720.80

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Solution

The fourth proportional to 571,391.28, 788,466.96 and 316,720.80 is: 437,045.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,391.28 : 788,466.96 = 316,720.80 : x
  2. Step 2: Convert to fraction form
    571,391.28/788,466.96 = 316,720.80/x
  3. Step 3: Cross multiply
    571,391.28x = 788,466.96 × 316,720.80
  4. Step 4: Simplify right side
    571,391.28x = 249,723,886,344.77
  5. Step 5: Solve for x
    x = 249,723,886,344.77/571,391.28
  6. Step 6: Final answer
    x = 437,045.32

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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.