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Finding the Fourth Proportional to 390,114.01, 585,340.04 and 137,574.93

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Solution

The fourth proportional to 390,114.01, 585,340.04 and 137,574.93 is: 206,422.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,114.01 : 585,340.04 = 137,574.93 : x
  2. Step 2: Convert to fraction form
    390,114.01/585,340.04 = 137,574.93/x
  3. Step 3: Cross multiply
    390,114.01x = 585,340.04 × 137,574.93
  4. Step 4: Simplify right side
    390,114.01x = 80,528,115,029.20
  5. Step 5: Solve for x
    x = 80,528,115,029.20/390,114.01
  6. Step 6: Final answer
    x = 206,422.00

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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.