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Finding the Fourth Proportional to 572,902.96, 790,628.52 and 391,994.32

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Solution

The fourth proportional to 572,902.96, 790,628.52 and 391,994.32 is: 540,967.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,902.96 : 790,628.52 = 391,994.32 : x
  2. Step 2: Convert to fraction form
    572,902.96/790,628.52 = 391,994.32/x
  3. Step 3: Cross multiply
    572,902.96x = 790,628.52 × 391,994.32
  4. Step 4: Simplify right side
    572,902.96x = 309,921,889,070.01
  5. Step 5: Solve for x
    x = 309,921,889,070.01/572,902.96
  6. Step 6: Final answer
    x = 540,967.51

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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.