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Finding the Fourth Proportional to 660,601.20, 990,901.80 and 345,017.10

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Solution

The fourth proportional to 660,601.20, 990,901.80 and 345,017.10 is: 517,525.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,601.20 : 990,901.80 = 345,017.10 : x
  2. Step 2: Convert to fraction form
    660,601.20/990,901.80 = 345,017.10/x
  3. Step 3: Cross multiply
    660,601.20x = 990,901.80 × 345,017.10
  4. Step 4: Simplify right side
    660,601.20x = 341,878,065,420.78
  5. Step 5: Solve for x
    x = 341,878,065,420.78/660,601.20
  6. Step 6: Final answer
    x = 517,525.65

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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.