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Finding the Fourth Proportional to 632,393.55, 872,621.85 and 387,487.82

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Solution

The fourth proportional to 632,393.55, 872,621.85 and 387,487.82 is: 534,683.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    632,393.55 : 872,621.85 = 387,487.82 : x
  2. Step 2: Convert to fraction form
    632,393.55/872,621.85 = 387,487.82/x
  3. Step 3: Cross multiply
    632,393.55x = 872,621.85 × 387,487.82
  4. Step 4: Simplify right side
    632,393.55x = 338,130,333,977.76
  5. Step 5: Solve for x
    x = 338,130,333,977.76/632,393.55
  6. Step 6: Final answer
    x = 534,683.40

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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.