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Finding the Fourth Proportional to 564,813.80, 847,220.70 and 423,096.20

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Solution

The fourth proportional to 564,813.80, 847,220.70 and 423,096.20 is: 634,644.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,813.80 : 847,220.70 = 423,096.20 : x
  2. Step 2: Convert to fraction form
    564,813.80/847,220.70 = 423,096.20/x
  3. Step 3: Cross multiply
    564,813.80x = 847,220.70 × 423,096.20
  4. Step 4: Simplify right side
    564,813.80x = 358,455,858,731.34
  5. Step 5: Solve for x
    x = 358,455,858,731.34/564,813.80
  6. Step 6: Final answer
    x = 634,644.30

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Half scale
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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.