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Finding the Fourth Proportional to 642,396.60, 886,483.62 and 370,475.82

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Solution

The fourth proportional to 642,396.60, 886,483.62 and 370,475.82 is: 511,242.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,396.60 : 886,483.62 = 370,475.82 : x
  2. Step 2: Convert to fraction form
    642,396.60/886,483.62 = 370,475.82/x
  3. Step 3: Cross multiply
    642,396.60x = 886,483.62 × 370,475.82
  4. Step 4: Simplify right side
    642,396.60x = 328,420,746,036.07
  5. Step 5: Solve for x
    x = 328,420,746,036.07/642,396.60
  6. Step 6: Final answer
    x = 511,242.97

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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.