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Finding the Fourth Proportional to 620,366.80, 856,326.16 and 375,364.20

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Solution

The fourth proportional to 620,366.80, 856,326.16 and 375,364.20 is: 518,135.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,366.80 : 856,326.16 = 375,364.20 : x
  2. Step 2: Convert to fraction form
    620,366.80/856,326.16 = 375,364.20/x
  3. Step 3: Cross multiply
    620,366.80x = 856,326.16 × 375,364.20
  4. Step 4: Simplify right side
    620,366.80x = 321,434,183,987.47
  5. Step 5: Solve for x
    x = 321,434,183,987.47/620,366.80
  6. Step 6: Final answer
    x = 518,135.70

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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.