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Finding the Fourth Proportional to 680,802.39, 939,499.67 and 374,872.55

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Solution

The fourth proportional to 680,802.39, 939,499.67 and 374,872.55 is: 517,319.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,802.39 : 939,499.67 = 374,872.55 : x
  2. Step 2: Convert to fraction form
    680,802.39/939,499.67 = 374,872.55/x
  3. Step 3: Cross multiply
    680,802.39x = 939,499.67 × 374,872.55
  4. Step 4: Simplify right side
    680,802.39x = 352,192,630,445.20
  5. Step 5: Solve for x
    x = 352,192,630,445.20/680,802.39
  6. Step 6: Final answer
    x = 517,319.91

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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.