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Finding the Fourth Proportional to 1,007,810.96, 1,390,779 and 555,101.96

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Solution

The fourth proportional to 1,007,810.96, 1,390,779 and 555,101.96 is: 766,040.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007,810.96 : 1,390,779 = 555,101.96 : x
  2. Step 2: Convert to fraction form
    1,007,810.96/1,390,779 = 555,101.96/x
  3. Step 3: Cross multiply
    1,007,810.96x = 1,390,779 × 555,101.96
  4. Step 4: Simplify right side
    1,007,810.96x = 772,024,148,826.84
  5. Step 5: Solve for x
    x = 772,024,148,826.84/1,007,810.96
  6. Step 6: Final answer
    x = 766,040.64

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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.