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Finding the Fourth Proportional to 487,223.40, 730,835.10 and 319,261.80

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Solution

The fourth proportional to 487,223.40, 730,835.10 and 319,261.80 is: 478,892.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,223.40 : 730,835.10 = 319,261.80 : x
  2. Step 2: Convert to fraction form
    487,223.40/730,835.10 = 319,261.80/x
  3. Step 3: Cross multiply
    487,223.40x = 730,835.10 × 319,261.80
  4. Step 4: Simplify right side
    487,223.40x = 233,327,729,529.18
  5. Step 5: Solve for x
    x = 233,327,729,529.18/487,223.40
  6. Step 6: Final answer
    x = 478,892.70

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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.