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Finding the Fourth Proportional to 617,143.86, 851,315.56 and 358,991.76

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Solution

The fourth proportional to 617,143.86, 851,315.56 and 358,991.76 is: 495,209.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,143.86 : 851,315.56 = 358,991.76 : x
  2. Step 2: Convert to fraction form
    617,143.86/851,315.56 = 358,991.76/x
  3. Step 3: Cross multiply
    617,143.86x = 851,315.56 × 358,991.76
  4. Step 4: Simplify right side
    617,143.86x = 305,615,271,199.79
  5. Step 5: Solve for x
    x = 305,615,271,199.79/617,143.86
  6. Step 6: Final answer
    x = 495,209.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.