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Finding the Fourth Proportional to 572,893.96, 790,616.10 and 391,985.32

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Solution

The fourth proportional to 572,893.96, 790,616.10 and 391,985.32 is: 540,955.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,893.96 : 790,616.10 = 391,985.32 : x
  2. Step 2: Convert to fraction form
    572,893.96/790,616.10 = 391,985.32/x
  3. Step 3: Cross multiply
    572,893.96x = 790,616.10 × 391,985.32
  4. Step 4: Simplify right side
    572,893.96x = 309,909,904,955.65
  5. Step 5: Solve for x
    x = 309,909,904,955.65/572,893.96
  6. Step 6: Final answer
    x = 540,955.09

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Double scale
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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.