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Finding the Fourth Proportional to 722,656.56, 997,265.34 and 400,386.72

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Solution

The fourth proportional to 722,656.56, 997,265.34 and 400,386.72 is: 552,533.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,656.56 : 997,265.34 = 400,386.72 : x
  2. Step 2: Convert to fraction form
    722,656.56/997,265.34 = 400,386.72/x
  3. Step 3: Cross multiply
    722,656.56x = 997,265.34 × 400,386.72
  4. Step 4: Simplify right side
    722,656.56x = 399,291,798,452.29
  5. Step 5: Solve for x
    x = 399,291,798,452.29/722,656.56
  6. Step 6: Final answer
    x = 552,533.28

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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.