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Finding the Fourth Proportional to 528,008.40, 791,429.40 and 291,520.80

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Solution

The fourth proportional to 528,008.40, 791,429.40 and 291,520.80 is: 436,959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,008.40 : 791,429.40 = 291,520.80 : x
  2. Step 2: Convert to fraction form
    528,008.40/791,429.40 = 291,520.80/x
  3. Step 3: Cross multiply
    528,008.40x = 791,429.40 × 291,520.80
  4. Step 4: Simplify right side
    528,008.40x = 230,718,131,831.52
  5. Step 5: Solve for x
    x = 230,718,131,831.52/528,008.40
  6. Step 6: Final answer
    x = 436,959.21

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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.