Home / 438,438.10-657,657.15-420,942.10

Finding the Fourth Proportional to 438,438.10, 657,657.15 and 420,942.10

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Solution

The fourth proportional to 438,438.10, 657,657.15 and 420,942.10 is: 631,413.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,438.10 : 657,657.15 = 420,942.10 : x
  2. Step 2: Convert to fraction form
    438,438.10/657,657.15 = 420,942.10/x
  3. Step 3: Cross multiply
    438,438.10x = 657,657.15 × 420,942.10
  4. Step 4: Simplify right side
    438,438.10x = 276,835,581,801.02
  5. Step 5: Solve for x
    x = 276,835,581,801.02/438,438.10
  6. Step 6: Final answer
    x = 631,413.15

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1.5x scale

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.