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Finding the Fourth Proportional to 319,087.20, 478,193.40 and 260,038.20

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Solution

The fourth proportional to 319,087.20, 478,193.40 and 260,038.20 is: 389,700.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,087.20 : 478,193.40 = 260,038.20 : x
  2. Step 2: Convert to fraction form
    319,087.20/478,193.40 = 260,038.20/x
  3. Step 3: Cross multiply
    319,087.20x = 478,193.40 × 260,038.20
  4. Step 4: Simplify right side
    319,087.20x = 124,348,550,987.88
  5. Step 5: Solve for x
    x = 124,348,550,987.88/319,087.20
  6. Step 6: Final answer
    x = 389,700.84

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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.