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Finding the Fourth Proportional to 210,430.47, 315,646.56 and 52,658.49

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Solution

The fourth proportional to 210,430.47, 315,646.56 and 52,658.49 is: 78,987.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,430.47 : 315,646.56 = 52,658.49 : x
  2. Step 2: Convert to fraction form
    210,430.47/315,646.56 = 52,658.49/x
  3. Step 3: Cross multiply
    210,430.47x = 315,646.56 × 52,658.49
  4. Step 4: Simplify right side
    210,430.47x = 16,621,471,223.29
  5. Step 5: Solve for x
    x = 16,621,471,223.29/210,430.47
  6. Step 6: Final answer
    x = 78,987.95

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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.