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Finding the Fourth Proportional to 485,503.54, 670,281.86 and 431,639.54

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Solution

The fourth proportional to 485,503.54, 670,281.86 and 431,639.54 is: 595,917.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,503.54 : 670,281.86 = 431,639.54 : x
  2. Step 2: Convert to fraction form
    485,503.54/670,281.86 = 431,639.54/x
  3. Step 3: Cross multiply
    485,503.54x = 670,281.86 × 431,639.54
  4. Step 4: Simplify right side
    485,503.54x = 289,320,153,720.74
  5. Step 5: Solve for x
    x = 289,320,153,720.74/485,503.54
  6. Step 6: Final answer
    x = 595,917.70

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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.