Home / 728,280.11-1,005,086.40-401,657.01

Finding the Fourth Proportional to 728,280.11, 1,005,086.40 and 401,657.01

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Solution

The fourth proportional to 728,280.11, 1,005,086.40 and 401,657.01 is: 554,319.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,280.11 : 1,005,086.40 = 401,657.01 : x
  2. Step 2: Convert to fraction form
    728,280.11/1,005,086.40 = 401,657.01/x
  3. Step 3: Cross multiply
    728,280.11x = 1,005,086.40 × 401,657.01
  4. Step 4: Simplify right side
    728,280.11x = 403,699,998,215.66
  5. Step 5: Solve for x
    x = 403,699,998,215.66/728,280.11
  6. Step 6: Final answer
    x = 554,319.68

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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.