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Finding the Fourth Proportional to 660,574.71, 990,608.54 and 281,254.95

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Solution

The fourth proportional to 660,574.71, 990,608.54 and 281,254.95 is: 421,774.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,574.71 : 990,608.54 = 281,254.95 : x
  2. Step 2: Convert to fraction form
    660,574.71/990,608.54 = 281,254.95/x
  3. Step 3: Cross multiply
    660,574.71x = 990,608.54 × 281,254.95
  4. Step 4: Simplify right side
    660,574.71x = 278,613,553,981.00
  5. Step 5: Solve for x
    x = 278,613,553,981.00/660,574.71
  6. Step 6: Final answer
    x = 421,774.48

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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.