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Finding the Fourth Proportional to 390,044.16, 584,685.54 and 190,356.48

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Solution

The fourth proportional to 390,044.16, 584,685.54 and 190,356.48 is: 285,348.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,044.16 : 584,685.54 = 190,356.48 : x
  2. Step 2: Convert to fraction form
    390,044.16/584,685.54 = 190,356.48/x
  3. Step 3: Cross multiply
    390,044.16x = 584,685.54 × 190,356.48
  4. Step 4: Simplify right side
    390,044.16x = 111,298,681,301.30
  5. Step 5: Solve for x
    x = 111,298,681,301.30/390,044.16
  6. Step 6: Final answer
    x = 285,348.92

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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.