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Finding the Fourth Proportional to 473,428.40, 710,142.60 and 421,818.80

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Solution

The fourth proportional to 473,428.40, 710,142.60 and 421,818.80 is: 632,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    473,428.40 : 710,142.60 = 421,818.80 : x
  2. Step 2: Convert to fraction form
    473,428.40/710,142.60 = 421,818.80/x
  3. Step 3: Cross multiply
    473,428.40x = 710,142.60 × 421,818.80
  4. Step 4: Simplify right side
    473,428.40x = 299,551,499,360.88
  5. Step 5: Solve for x
    x = 299,551,499,360.88/473,428.40
  6. Step 6: Final answer
    x = 632,728.20

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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.