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Finding the Fourth Proportional to 318,866,986.60, 478,300,479.90 and 291,657,207.40

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Solution

The fourth proportional to 318,866,986.60, 478,300,479.90 and 291,657,207.40 is: 437,485,811.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,866,986.60 : 478,300,479.90 = 291,657,207.40 : x
  2. Step 2: Convert to fraction form
    318,866,986.60/478,300,479.90 = 291,657,207.40/x
  3. Step 3: Cross multiply
    318,866,986.60x = 478,300,479.90 × 291,657,207.40
  4. Step 4: Simplify right side
    318,866,986.60x = 139,499,782,265,713,808
  5. Step 5: Solve for x
    x = 139,499,782,265,713,808/318,866,986.60
  6. Step 6: Final answer
    x = 437,485,811.10

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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.