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Finding the Fourth Proportional to 318,877.60, 478,316.40 and 306,630.40

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Solution

The fourth proportional to 318,877.60, 478,316.40 and 306,630.40 is: 459,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,877.60 : 478,316.40 = 306,630.40 : x
  2. Step 2: Convert to fraction form
    318,877.60/478,316.40 = 306,630.40/x
  3. Step 3: Cross multiply
    318,877.60x = 478,316.40 × 306,630.40
  4. Step 4: Simplify right side
    318,877.60x = 146,666,349,058.56
  5. Step 5: Solve for x
    x = 146,666,349,058.56/318,877.60
  6. Step 6: Final answer
    x = 459,945.60

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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.