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Finding the Fourth Proportional to 642,570.30, 886,752.15 and 356,095.14

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Solution

The fourth proportional to 642,570.30, 886,752.15 and 356,095.14 is: 491,414.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,570.30 : 886,752.15 = 356,095.14 : x
  2. Step 2: Convert to fraction form
    642,570.30/886,752.15 = 356,095.14/x
  3. Step 3: Cross multiply
    642,570.30x = 886,752.15 × 356,095.14
  4. Step 4: Simplify right side
    642,570.30x = 315,768,130,999.55
  5. Step 5: Solve for x
    x = 315,768,130,999.55/642,570.30
  6. Step 6: Final answer
    x = 491,414.14

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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.