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Finding the Fourth Proportional to 468,638.40, 646,562.28 and 307,478.40

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Solution

The fourth proportional to 468,638.40, 646,562.28 and 307,478.40 is: 424,216.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,638.40 : 646,562.28 = 307,478.40 : x
  2. Step 2: Convert to fraction form
    468,638.40/646,562.28 = 307,478.40/x
  3. Step 3: Cross multiply
    468,638.40x = 646,562.28 × 307,478.40
  4. Step 4: Simplify right side
    468,638.40x = 198,803,935,354.75
  5. Step 5: Solve for x
    x = 198,803,935,354.75/468,638.40
  6. Step 6: Final answer
    x = 424,216.06

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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.