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Finding the Fourth Proportional to 315,658.60, 473,487.90 and 79,000.90

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Solution

The fourth proportional to 315,658.60, 473,487.90 and 79,000.90 is: 118,501.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,658.60 : 473,487.90 = 79,000.90 : x
  2. Step 2: Convert to fraction form
    315,658.60/473,487.90 = 79,000.90/x
  3. Step 3: Cross multiply
    315,658.60x = 473,487.90 × 79,000.90
  4. Step 4: Simplify right side
    315,658.60x = 37,405,970,239.11
  5. Step 5: Solve for x
    x = 37,405,970,239.11/315,658.60
  6. Step 6: Final answer
    x = 118,501.35

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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.