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Finding the Fourth Proportional to 319,070.40, 478,492.20 and 141,259.20

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Solution

The fourth proportional to 319,070.40, 478,492.20 and 141,259.20 is: 211,838.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,070.40 : 478,492.20 = 141,259.20 : x
  2. Step 2: Convert to fraction form
    319,070.40/478,492.20 = 141,259.20/x
  3. Step 3: Cross multiply
    319,070.40x = 478,492.20 × 141,259.20
  4. Step 4: Simplify right side
    319,070.40x = 67,591,425,378.24
  5. Step 5: Solve for x
    x = 67,591,425,378.24/319,070.40
  6. Step 6: Final answer
    x = 211,838.60

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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.