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Finding the Fourth Proportional to 1,148,867.90, 1,584,405.60 and 719,187.20

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Solution

The fourth proportional to 1,148,867.90, 1,584,405.60 and 719,187.20 is: 991,832.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148,867.90 : 1,584,405.60 = 719,187.20 : x
  2. Step 2: Convert to fraction form
    1,148,867.90/1,584,405.60 = 719,187.20/x
  3. Step 3: Cross multiply
    1,148,867.90x = 1,584,405.60 × 719,187.20
  4. Step 4: Simplify right side
    1,148,867.90x = 1,139,484,227,128.32
  5. Step 5: Solve for x
    x = 1,139,484,227,128.32/1,148,867.90
  6. Step 6: Final answer
    x = 991,832.24

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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.