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Finding the Fourth Proportional to 520,045.28, 780,164.76 and 164,963.60

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Solution

The fourth proportional to 520,045.28, 780,164.76 and 164,963.60 is: 247,476.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,045.28 : 780,164.76 = 164,963.60 : x
  2. Step 2: Convert to fraction form
    520,045.28/780,164.76 = 164,963.60/x
  3. Step 3: Cross multiply
    520,045.28x = 780,164.76 × 164,963.60
  4. Step 4: Simplify right side
    520,045.28x = 128,698,787,402.74
  5. Step 5: Solve for x
    x = 128,698,787,402.74/520,045.28
  6. Step 6: Final answer
    x = 247,476.12

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1.5x scale

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.