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Finding the Fourth Proportional to 557,141.76, 835,578.72 and 390,156.48

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Solution

The fourth proportional to 557,141.76, 835,578.72 and 390,156.48 is: 585,140.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,141.76 : 835,578.72 = 390,156.48 : x
  2. Step 2: Convert to fraction form
    557,141.76/835,578.72 = 390,156.48/x
  3. Step 3: Cross multiply
    557,141.76x = 835,578.72 × 390,156.48
  4. Step 4: Simplify right side
    557,141.76x = 326,006,452,158.11
  5. Step 5: Solve for x
    x = 326,006,452,158.11/557,141.76
  6. Step 6: Final answer
    x = 585,140.94

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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.