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Finding the Fourth Proportional to 566,389.40, 781,611.36 and 311,735.12

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Solution

The fourth proportional to 566,389.40, 781,611.36 and 311,735.12 is: 430,191.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,389.40 : 781,611.36 = 311,735.12 : x
  2. Step 2: Convert to fraction form
    566,389.40/781,611.36 = 311,735.12/x
  3. Step 3: Cross multiply
    566,389.40x = 781,611.36 × 311,735.12
  4. Step 4: Simplify right side
    566,389.40x = 243,655,711,102.96
  5. Step 5: Solve for x
    x = 243,655,711,102.96/566,389.40
  6. Step 6: Final answer
    x = 430,191.16

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Double scale
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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.