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Finding the Fourth Proportional to 478,475.75, 660,571.45 and 317,549.00

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Solution

The fourth proportional to 478,475.75, 660,571.45 and 317,549.00 is: 438,400.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,475.75 : 660,571.45 = 317,549.00 : x
  2. Step 2: Convert to fraction form
    478,475.75/660,571.45 = 317,549.00/x
  3. Step 3: Cross multiply
    478,475.75x = 660,571.45 × 317,549.00
  4. Step 4: Simplify right side
    478,475.75x = 209,763,804,233.61
  5. Step 5: Solve for x
    x = 209,763,804,233.61/478,475.75
  6. Step 6: Final answer
    x = 438,400.07

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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.