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Finding the Fourth Proportional to 478,673.43, 718,075.76 and 212,428.05

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Solution

The fourth proportional to 478,673.43, 718,075.76 and 212,428.05 is: 318,671.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,673.43 : 718,075.76 = 212,428.05 : x
  2. Step 2: Convert to fraction form
    478,673.43/718,075.76 = 212,428.05/x
  3. Step 3: Cross multiply
    478,673.43x = 718,075.76 × 212,428.05
  4. Step 4: Simplify right side
    478,673.43x = 152,539,432,386.93
  5. Step 5: Solve for x
    x = 152,539,432,386.93/478,673.43
  6. Step 6: Final answer
    x = 318,671.19

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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.