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Finding the Fourth Proportional to 660,396, 911,346.48 and 358,590

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Solution

The fourth proportional to 660,396, 911,346.48 and 358,590 is: 494,854.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,396 : 911,346.48 = 358,590 : x
  2. Step 2: Convert to fraction form
    660,396/911,346.48 = 358,590/x
  3. Step 3: Cross multiply
    660,396x = 911,346.48 × 358,590
  4. Step 4: Simplify right side
    660,396x = 326,799,734,263.20
  5. Step 5: Solve for x
    x = 326,799,734,263.20/660,396
  6. Step 6: Final answer
    x = 494,854.20

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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.