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Finding the Fourth Proportional to 660,699.78, 911,741.33 and 358,887.30

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Solution

The fourth proportional to 660,699.78, 911,741.33 and 358,887.30 is: 495,251.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,699.78 : 911,741.33 = 358,887.30 : x
  2. Step 2: Convert to fraction form
    660,699.78/911,741.33 = 358,887.30/x
  3. Step 3: Cross multiply
    660,699.78x = 911,741.33 × 358,887.30
  4. Step 4: Simplify right side
    660,699.78x = 327,212,382,427.67
  5. Step 5: Solve for x
    x = 327,212,382,427.67/660,699.78
  6. Step 6: Final answer
    x = 495,251.24

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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.