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Finding the Fourth Proportional to 487,289.30, 730,824.60 and 319,983.80

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Solution

The fourth proportional to 487,289.30, 730,824.60 and 319,983.80 is: 479,903.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,289.30 : 730,824.60 = 319,983.80 : x
  2. Step 2: Convert to fraction form
    487,289.30/730,824.60 = 319,983.80/x
  3. Step 3: Cross multiply
    487,289.30x = 730,824.60 × 319,983.80
  4. Step 4: Simplify right side
    487,289.30x = 233,852,032,641.48
  5. Step 5: Solve for x
    x = 233,852,032,641.48/487,289.30
  6. Step 6: Final answer
    x = 479,903.89

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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.