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Finding the Fourth Proportional to 660,147.69, 911,018.30 and 402,036.74

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Solution

The fourth proportional to 660,147.69, 911,018.30 and 402,036.74 is: 554,819.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,147.69 : 911,018.30 = 402,036.74 : x
  2. Step 2: Convert to fraction form
    660,147.69/911,018.30 = 402,036.74/x
  3. Step 3: Cross multiply
    660,147.69x = 911,018.30 × 402,036.74
  4. Step 4: Simplify right side
    660,147.69x = 366,262,820,847.07
  5. Step 5: Solve for x
    x = 366,262,820,847.07/660,147.69
  6. Step 6: Final answer
    x = 554,819.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.