Home / 318,913,617.20-478,370,425.80-312,866,999.60

Finding the Fourth Proportional to 318,913,617.20, 478,370,425.80 and 312,866,999.60

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Solution

The fourth proportional to 318,913,617.20, 478,370,425.80 and 312,866,999.60 is: 469,300,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,913,617.20 : 478,370,425.80 = 312,866,999.60 : x
  2. Step 2: Convert to fraction form
    318,913,617.20/478,370,425.80 = 312,866,999.60/x
  3. Step 3: Cross multiply
    318,913,617.20x = 478,370,425.80 × 312,866,999.60
  4. Step 4: Simplify right side
    318,913,617.20x = 149,666,319,817,420,448
  5. Step 5: Solve for x
    x = 149,666,319,817,420,448/318,913,617.20
  6. Step 6: Final answer
    x = 469,300,499.40

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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.