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Finding the Fourth Proportional to 520,071.40, 780,182.70 and 220,551.40

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Solution

The fourth proportional to 520,071.40, 780,182.70 and 220,551.40 is: 330,859.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,071.40 : 780,182.70 = 220,551.40 : x
  2. Step 2: Convert to fraction form
    520,071.40/780,182.70 = 220,551.40/x
  3. Step 3: Cross multiply
    520,071.40x = 780,182.70 × 220,551.40
  4. Step 4: Simplify right side
    520,071.40x = 172,070,386,740.78
  5. Step 5: Solve for x
    x = 172,070,386,740.78/520,071.40
  6. Step 6: Final answer
    x = 330,859.16

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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.