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Finding the Fourth Proportional to 660,210.10, 990,643.20 and 260,863.90

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Solution

The fourth proportional to 660,210.10, 990,643.20 and 260,863.90 is: 391,425.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,210.10 : 990,643.20 = 260,863.90 : x
  2. Step 2: Convert to fraction form
    660,210.10/990,643.20 = 260,863.90/x
  3. Step 3: Cross multiply
    660,210.10x = 990,643.20 × 260,863.90
  4. Step 4: Simplify right side
    660,210.10x = 258,423,048,660.48
  5. Step 5: Solve for x
    x = 258,423,048,660.48/660,210.10
  6. Step 6: Final answer
    x = 391,425.47

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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.