Home / 651,680.20-977,520.30-385,303.60

Finding the Fourth Proportional to 651,680.20, 977,520.30 and 385,303.60

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Solution

The fourth proportional to 651,680.20, 977,520.30 and 385,303.60 is: 577,955.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,680.20 : 977,520.30 = 385,303.60 : x
  2. Step 2: Convert to fraction form
    651,680.20/977,520.30 = 385,303.60/x
  3. Step 3: Cross multiply
    651,680.20x = 977,520.30 × 385,303.60
  4. Step 4: Simplify right side
    651,680.20x = 376,642,090,663.08
  5. Step 5: Solve for x
    x = 376,642,090,663.08/651,680.20
  6. Step 6: Final answer
    x = 577,955.40

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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.