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Finding the Fourth Proportional to 1,009,728.12, 1,393,402.38 and 557,019

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Solution

The fourth proportional to 1,009,728.12, 1,393,402.38 and 557,019 is: 768,673.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009,728.12 : 1,393,402.38 = 557,019 : x
  2. Step 2: Convert to fraction form
    1,009,728.12/1,393,402.38 = 557,019/x
  3. Step 3: Cross multiply
    1,009,728.12x = 1,393,402.38 × 557,019
  4. Step 4: Simplify right side
    1,009,728.12x = 776,151,600,305.22
  5. Step 5: Solve for x
    x = 776,151,600,305.22/1,009,728.12
  6. Step 6: Final answer
    x = 768,673.85

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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.