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Finding the Fourth Proportional to 545,830.90, 818,746.35 and 397,114.90

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Solution

The fourth proportional to 545,830.90, 818,746.35 and 397,114.90 is: 595,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,830.90 : 818,746.35 = 397,114.90 : x
  2. Step 2: Convert to fraction form
    545,830.90/818,746.35 = 397,114.90/x
  3. Step 3: Cross multiply
    545,830.90x = 818,746.35 × 397,114.90
  4. Step 4: Simplify right side
    545,830.90x = 325,136,374,905.62
  5. Step 5: Solve for x
    x = 325,136,374,905.62/545,830.90
  6. Step 6: Final answer
    x = 595,672.35

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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.