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Finding the Fourth Proportional to 642,455.72, 886,564.98 and 370,535

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Solution

The fourth proportional to 642,455.72, 886,564.98 and 370,535 is: 511,324.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,455.72 : 886,564.98 = 370,535 : x
  2. Step 2: Convert to fraction form
    642,455.72/886,564.98 = 370,535/x
  3. Step 3: Cross multiply
    642,455.72x = 886,564.98 × 370,535
  4. Step 4: Simplify right side
    642,455.72x = 328,503,354,864.30
  5. Step 5: Solve for x
    x = 328,503,354,864.30/642,455.72
  6. Step 6: Final answer
    x = 511,324.51

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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.