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Finding the Fourth Proportional to 402,895.40, 604,343.10 and 262,812.20

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Solution

The fourth proportional to 402,895.40, 604,343.10 and 262,812.20 is: 394,218.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,895.40 : 604,343.10 = 262,812.20 : x
  2. Step 2: Convert to fraction form
    402,895.40/604,343.10 = 262,812.20/x
  3. Step 3: Cross multiply
    402,895.40x = 604,343.10 × 262,812.20
  4. Step 4: Simplify right side
    402,895.40x = 158,828,739,665.82
  5. Step 5: Solve for x
    x = 158,828,739,665.82/402,895.40
  6. Step 6: Final answer
    x = 394,218.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.