Home / 485,808,217.60-728,712,326.40-438,946,931.20

Finding the Fourth Proportional to 485,808,217.60, 728,712,326.40 and 438,946,931.20

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Solution

The fourth proportional to 485,808,217.60, 728,712,326.40 and 438,946,931.20 is: 658,420,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,808,217.60 : 728,712,326.40 = 438,946,931.20 : x
  2. Step 2: Convert to fraction form
    485,808,217.60/728,712,326.40 = 438,946,931.20/x
  3. Step 3: Cross multiply
    485,808,217.60x = 728,712,326.40 × 438,946,931.20
  4. Step 4: Simplify right side
    485,808,217.60x = 319,866,039,400,892,736
  5. Step 5: Solve for x
    x = 319,866,039,400,892,736/485,808,217.60
  6. Step 6: Final answer
    x = 658,420,396.80

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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.