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Finding the Fourth Proportional to 790,362, 1,090,401.89 and 518,579.87

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Solution

The fourth proportional to 790,362, 1,090,401.89 and 518,579.87 is: 715,444.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,362 : 1,090,401.89 = 518,579.87 : x
  2. Step 2: Convert to fraction form
    790,362/1,090,401.89 = 518,579.87/x
  3. Step 3: Cross multiply
    790,362x = 1,090,401.89 × 518,579.87
  4. Step 4: Simplify right side
    790,362x = 565,460,462,319.05
  5. Step 5: Solve for x
    x = 565,460,462,319.05/790,362
  6. Step 6: Final answer
    x = 715,444.90

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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.