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Finding the Fourth Proportional to 387,472.24, 581,210.21 and 117,602.72

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Solution

The fourth proportional to 387,472.24, 581,210.21 and 117,602.72 is: 176,404.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,472.24 : 581,210.21 = 117,602.72 : x
  2. Step 2: Convert to fraction form
    387,472.24/581,210.21 = 117,602.72/x
  3. Step 3: Cross multiply
    387,472.24x = 581,210.21 × 117,602.72
  4. Step 4: Simplify right side
    387,472.24x = 68,351,900,824.51
  5. Step 5: Solve for x
    x = 68,351,900,824.51/387,472.24
  6. Step 6: Final answer
    x = 176,404.64

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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.