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Finding the Fourth Proportional to 642,273.12, 885,303.90 and 435,474.54

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Solution

The fourth proportional to 642,273.12, 885,303.90 and 435,474.54 is: 600,254.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,273.12 : 885,303.90 = 435,474.54 : x
  2. Step 2: Convert to fraction form
    642,273.12/885,303.90 = 435,474.54/x
  3. Step 3: Cross multiply
    642,273.12x = 885,303.90 × 435,474.54
  4. Step 4: Simplify right side
    642,273.12x = 385,527,308,612.71
  5. Step 5: Solve for x
    x = 385,527,308,612.71/642,273.12
  6. Step 6: Final answer
    x = 600,254.47

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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.