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Finding the Fourth Proportional to 284,316.64, 392,351.82 and 156,989.50

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Solution

The fourth proportional to 284,316.64, 392,351.82 and 156,989.50 is: 216,642.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,316.64 : 392,351.82 = 156,989.50 : x
  2. Step 2: Convert to fraction form
    284,316.64/392,351.82 = 156,989.50/x
  3. Step 3: Cross multiply
    284,316.64x = 392,351.82 × 156,989.50
  4. Step 4: Simplify right side
    284,316.64x = 61,595,116,045.89
  5. Step 5: Solve for x
    x = 61,595,116,045.89/284,316.64
  6. Step 6: Final answer
    x = 216,642.67

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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.