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Finding the Fourth Proportional to 927,810, 1,389,352.42 and 611,307.36

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Solution

The fourth proportional to 927,810, 1,389,352.42 and 611,307.36 is: 915,404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    927,810 : 1,389,352.42 = 611,307.36 : x
  2. Step 2: Convert to fraction form
    927,810/1,389,352.42 = 611,307.36/x
  3. Step 3: Cross multiply
    927,810x = 1,389,352.42 × 611,307.36
  4. Step 4: Simplify right side
    927,810x = 849,321,359,979.81
  5. Step 5: Solve for x
    x = 849,321,359,979.81/927,810
  6. Step 6: Final answer
    x = 915,404.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.