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Finding the Fourth Proportional to 716,140, 988,298.04 and 393,874.48

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Solution

The fourth proportional to 716,140, 988,298.04 and 393,874.48 is: 543,560.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,140 : 988,298.04 = 393,874.48 : x
  2. Step 2: Convert to fraction form
    716,140/988,298.04 = 393,874.48/x
  3. Step 3: Cross multiply
    716,140x = 988,298.04 × 393,874.48
  4. Step 4: Simplify right side
    716,140x = 389,265,376,590.02
  5. Step 5: Solve for x
    x = 389,265,376,590.02/716,140
  6. Step 6: Final answer
    x = 543,560.44

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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.