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Finding the Fourth Proportional to 772,590.60, 1,158,885.90 and 613,960.20

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Solution

The fourth proportional to 772,590.60, 1,158,885.90 and 613,960.20 is: 920,940.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,590.60 : 1,158,885.90 = 613,960.20 : x
  2. Step 2: Convert to fraction form
    772,590.60/1,158,885.90 = 613,960.20/x
  3. Step 3: Cross multiply
    772,590.60x = 1,158,885.90 × 613,960.20
  4. Step 4: Simplify right side
    772,590.60x = 711,509,818,941.18
  5. Step 5: Solve for x
    x = 711,509,818,941.18/772,590.60
  6. Step 6: Final answer
    x = 920,940.30

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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.