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Finding the Fourth Proportional to 612,117.60, 918,176.40 and 486,146.40

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Solution

The fourth proportional to 612,117.60, 918,176.40 and 486,146.40 is: 729,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,117.60 : 918,176.40 = 486,146.40 : x
  2. Step 2: Convert to fraction form
    612,117.60/918,176.40 = 486,146.40/x
  3. Step 3: Cross multiply
    612,117.60x = 918,176.40 × 486,146.40
  4. Step 4: Simplify right side
    612,117.60x = 446,368,151,424.96
  5. Step 5: Solve for x
    x = 446,368,151,424.96/612,117.60
  6. Step 6: Final answer
    x = 729,219.60

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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.