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Finding the Fourth Proportional to 658,705.45, 909,014.12 and 356,899.45

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Solution

The fourth proportional to 658,705.45, 909,014.12 and 356,899.45 is: 492,521.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,705.45 : 909,014.12 = 356,899.45 : x
  2. Step 2: Convert to fraction form
    658,705.45/909,014.12 = 356,899.45/x
  3. Step 3: Cross multiply
    658,705.45x = 909,014.12 × 356,899.45
  4. Step 4: Simplify right side
    658,705.45x = 324,426,639,470.23
  5. Step 5: Solve for x
    x = 324,426,639,470.23/658,705.45
  6. Step 6: Final answer
    x = 492,521.57

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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.