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Finding the Fourth Proportional to 520,071.10, 780,106.65 and 488,578.30

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Solution

The fourth proportional to 520,071.10, 780,106.65 and 488,578.30 is: 732,867.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,071.10 : 780,106.65 = 488,578.30 : x
  2. Step 2: Convert to fraction form
    520,071.10/780,106.65 = 488,578.30/x
  3. Step 3: Cross multiply
    520,071.10x = 780,106.65 × 488,578.30
  4. Step 4: Simplify right side
    520,071.10x = 381,143,180,875.70
  5. Step 5: Solve for x
    x = 381,143,180,875.70/520,071.10
  6. Step 6: Final answer
    x = 732,867.45

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Double scale
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Similar ratio
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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.