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Finding the Fourth Proportional to 656,349.38, 905,762.96 and 354,543.38

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Solution

The fourth proportional to 656,349.38, 905,762.96 and 354,543.38 is: 489,270.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,349.38 : 905,762.96 = 354,543.38 : x
  2. Step 2: Convert to fraction form
    656,349.38/905,762.96 = 354,543.38/x
  3. Step 3: Cross multiply
    656,349.38x = 905,762.96 × 354,543.38
  4. Step 4: Simplify right side
    656,349.38x = 321,132,255,015.67
  5. Step 5: Solve for x
    x = 321,132,255,015.67/656,349.38
  6. Step 6: Final answer
    x = 489,270.30

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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.