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Finding the Fourth Proportional to 572,513.80, 790,093.72 and 317,865

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Solution

The fourth proportional to 572,513.80, 790,093.72 and 317,865 is: 438,667.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,513.80 : 790,093.72 = 317,865 : x
  2. Step 2: Convert to fraction form
    572,513.80/790,093.72 = 317,865/x
  3. Step 3: Cross multiply
    572,513.80x = 790,093.72 × 317,865
  4. Step 4: Simplify right side
    572,513.80x = 251,143,140,307.80
  5. Step 5: Solve for x
    x = 251,143,140,307.80/572,513.80
  6. Step 6: Final answer
    x = 438,667.40

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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.