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Finding the Fourth Proportional to 524,085.40, 786,128.10 and 145,005.40

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Solution

The fourth proportional to 524,085.40, 786,128.10 and 145,005.40 is: 217,508.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,085.40 : 786,128.10 = 145,005.40 : x
  2. Step 2: Convert to fraction form
    524,085.40/786,128.10 = 145,005.40/x
  3. Step 3: Cross multiply
    524,085.40x = 786,128.10 × 145,005.40
  4. Step 4: Simplify right side
    524,085.40x = 113,992,819,591.74
  5. Step 5: Solve for x
    x = 113,992,819,591.74/524,085.40
  6. Step 6: Final answer
    x = 217,508.10

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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.