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Finding the Fourth Proportional to 458,214.80, 687,322.20 and 245,638.40

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Solution

The fourth proportional to 458,214.80, 687,322.20 and 245,638.40 is: 368,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,214.80 : 687,322.20 = 245,638.40 : x
  2. Step 2: Convert to fraction form
    458,214.80/687,322.20 = 245,638.40/x
  3. Step 3: Cross multiply
    458,214.80x = 687,322.20 × 245,638.40
  4. Step 4: Simplify right side
    458,214.80x = 168,832,725,492.48
  5. Step 5: Solve for x
    x = 168,832,725,492.48/458,214.80
  6. Step 6: Final answer
    x = 368,457.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.