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Finding the Fourth Proportional to 620,637, 856,479.87 and 352,365

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Solution

The fourth proportional to 620,637, 856,479.87 and 352,365 is: 486,264.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,637 : 856,479.87 = 352,365 : x
  2. Step 2: Convert to fraction form
    620,637/856,479.87 = 352,365/x
  3. Step 3: Cross multiply
    620,637x = 856,479.87 × 352,365
  4. Step 4: Simplify right side
    620,637x = 301,793,529,392.55
  5. Step 5: Solve for x
    x = 301,793,529,392.55/620,637
  6. Step 6: Final answer
    x = 486,264.16

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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.