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Finding the Fourth Proportional to 903,386.80, 1,354,205.40 and 808,908.40

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Solution

The fourth proportional to 903,386.80, 1,354,205.40 and 808,908.40 is: 1,212,579.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    903,386.80 : 1,354,205.40 = 808,908.40 : x
  2. Step 2: Convert to fraction form
    903,386.80/1,354,205.40 = 808,908.40/x
  3. Step 3: Cross multiply
    903,386.80x = 1,354,205.40 × 808,908.40
  4. Step 4: Simplify right side
    903,386.80x = 1,095,428,123,385.36
  5. Step 5: Solve for x
    x = 1,095,428,123,385.36/903,386.80
  6. Step 6: Final answer
    x = 1,212,579.29

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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.