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Finding the Fourth Proportional to 722,885.40, 997,587.72 and 400,600.80

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Solution

The fourth proportional to 722,885.40, 997,587.72 and 400,600.80 is: 552,832.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,885.40 : 997,587.72 = 400,600.80 : x
  2. Step 2: Convert to fraction form
    722,885.40/997,587.72 = 400,600.80/x
  3. Step 3: Cross multiply
    722,885.40x = 997,587.72 × 400,600.80
  4. Step 4: Simplify right side
    722,885.40x = 399,634,438,702.18
  5. Step 5: Solve for x
    x = 399,634,438,702.18/722,885.40
  6. Step 6: Final answer
    x = 552,832.36

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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.