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Finding the Fourth Proportional to 722,776.15, 997,430.11 and 400,507.12

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Solution

The fourth proportional to 722,776.15, 997,430.11 and 400,507.12 is: 552,699.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,776.15 : 997,430.11 = 400,507.12 : x
  2. Step 2: Convert to fraction form
    722,776.15/997,430.11 = 400,507.12/x
  3. Step 3: Cross multiply
    722,776.15x = 997,430.11 × 400,507.12
  4. Step 4: Simplify right side
    722,776.15x = 399,477,860,757.38
  5. Step 5: Solve for x
    x = 399,477,860,757.38/722,776.15
  6. Step 6: Final answer
    x = 552,699.28

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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.