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Finding the Fourth Proportional to 722,778.90, 997,433.91 and 400,509.87

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Solution

The fourth proportional to 722,778.90, 997,433.91 and 400,509.87 is: 552,703.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,778.90 : 997,433.91 = 400,509.87 : x
  2. Step 2: Convert to fraction form
    722,778.90/997,433.91 = 400,509.87/x
  3. Step 3: Cross multiply
    722,778.90x = 997,433.91 × 400,509.87
  4. Step 4: Simplify right side
    722,778.90x = 399,482,125,627.69
  5. Step 5: Solve for x
    x = 399,482,125,627.69/722,778.90
  6. Step 6: Final answer
    x = 552,703.08

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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.