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Finding the Fourth Proportional to 390,161.70, 585,488.58 and 153,473.63

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Solution

The fourth proportional to 390,161.70, 585,488.58 and 153,473.63 is: 230,307.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,161.70 : 585,488.58 = 153,473.63 : x
  2. Step 2: Convert to fraction form
    390,161.70/585,488.58 = 153,473.63/x
  3. Step 3: Cross multiply
    390,161.70x = 585,488.58 × 153,473.63
  4. Step 4: Simplify right side
    390,161.70x = 89,857,054,768.70
  5. Step 5: Solve for x
    x = 89,857,054,768.70/390,161.70
  6. Step 6: Final answer
    x = 230,307.22

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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.