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Finding the Fourth Proportional to 623,915.60, 861,109.40 and 352,060.58

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Solution

The fourth proportional to 623,915.60, 861,109.40 and 352,060.58 is: 485,903.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,915.60 : 861,109.40 = 352,060.58 : x
  2. Step 2: Convert to fraction form
    623,915.60/861,109.40 = 352,060.58/x
  3. Step 3: Cross multiply
    623,915.60x = 861,109.40 × 352,060.58
  4. Step 4: Simplify right side
    623,915.60x = 303,162,674,807.45
  5. Step 5: Solve for x
    x = 303,162,674,807.45/623,915.60
  6. Step 6: Final answer
    x = 485,903.34

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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.