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Finding the Fourth Proportional to 660,393, 911,342.34 and 358,587

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Solution

The fourth proportional to 660,393, 911,342.34 and 358,587 is: 494,850.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,393 : 911,342.34 = 358,587 : x
  2. Step 2: Convert to fraction form
    660,393/911,342.34 = 358,587/x
  3. Step 3: Cross multiply
    660,393x = 911,342.34 × 358,587
  4. Step 4: Simplify right side
    660,393x = 326,795,515,673.58
  5. Step 5: Solve for x
    x = 326,795,515,673.58/660,393
  6. Step 6: Final answer
    x = 494,850.06

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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.