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Finding the Fourth Proportional to 885,736,752.60, 1,328,605,128.90 and 639,573,281.40

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Solution

The fourth proportional to 885,736,752.60, 1,328,605,128.90 and 639,573,281.40 is: 959,359,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,736,752.60 : 1,328,605,128.90 = 639,573,281.40 : x
  2. Step 2: Convert to fraction form
    885,736,752.60/1,328,605,128.90 = 639,573,281.40/x
  3. Step 3: Cross multiply
    885,736,752.60x = 1,328,605,128.90 × 639,573,281.40
  4. Step 4: Simplify right side
    885,736,752.60x = 849,740,341,975,442,944
  5. Step 5: Solve for x
    x = 849,740,341,975,442,944/885,736,752.60
  6. Step 6: Final answer
    x = 959,359,922.10

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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.