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Finding the Fourth Proportional to 284,066.40, 392,019.78 and 156,750.20

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Solution

The fourth proportional to 284,066.40, 392,019.78 and 156,750.20 is: 216,319.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,066.40 : 392,019.78 = 156,750.20 : x
  2. Step 2: Convert to fraction form
    284,066.40/392,019.78 = 156,750.20/x
  3. Step 3: Cross multiply
    284,066.40x = 392,019.78 × 156,750.20
  4. Step 4: Simplify right side
    284,066.40x = 61,449,178,918.96
  5. Step 5: Solve for x
    x = 61,449,178,918.96/284,066.40
  6. Step 6: Final answer
    x = 216,319.77

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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.