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Finding the Fourth Proportional to 403,345.20, 605,017.80 and 262,340.40

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Solution

The fourth proportional to 403,345.20, 605,017.80 and 262,340.40 is: 393,510.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,345.20 : 605,017.80 = 262,340.40 : x
  2. Step 2: Convert to fraction form
    403,345.20/605,017.80 = 262,340.40/x
  3. Step 3: Cross multiply
    403,345.20x = 605,017.80 × 262,340.40
  4. Step 4: Simplify right side
    403,345.20x = 158,720,611,659.12
  5. Step 5: Solve for x
    x = 158,720,611,659.12/403,345.20
  6. Step 6: Final answer
    x = 393,510.60

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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.