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Finding the Fourth Proportional to 284,065.40, 392,018.40 and 156,749.20

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Solution

The fourth proportional to 284,065.40, 392,018.40 and 156,749.20 is: 216,318.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,065.40 : 392,018.40 = 156,749.20 : x
  2. Step 2: Convert to fraction form
    284,065.40/392,018.40 = 156,749.20/x
  3. Step 3: Cross multiply
    284,065.40x = 392,018.40 × 156,749.20
  4. Step 4: Simplify right side
    284,065.40x = 61,448,570,585.28
  5. Step 5: Solve for x
    x = 61,448,570,585.28/284,065.40
  6. Step 6: Final answer
    x = 216,318.39

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1.5x scale

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.