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Finding the Fourth Proportional to 390,784.93, 585,871.16 and 154,304.62

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Solution

The fourth proportional to 390,784.93, 585,871.16 and 154,304.62 is: 231,336.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,784.93 : 585,871.16 = 154,304.62 : x
  2. Step 2: Convert to fraction form
    390,784.93/585,871.16 = 154,304.62/x
  3. Step 3: Cross multiply
    390,784.93x = 585,871.16 × 154,304.62
  4. Step 4: Simplify right side
    390,784.93x = 90,402,623,783.40
  5. Step 5: Solve for x
    x = 90,402,623,783.40/390,784.93
  6. Step 6: Final answer
    x = 231,336.01

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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.