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Finding the Fourth Proportional to 631,909,641.64, 872,108,963.52 and 367,602,774.70

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Solution

The fourth proportional to 631,909,641.64, 872,108,963.52 and 367,602,774.70 is: 507,334,678.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,909,641.64 : 872,108,963.52 = 367,602,774.70 : x
  2. Step 2: Convert to fraction form
    631,909,641.64/872,108,963.52 = 367,602,774.70/x
  3. Step 3: Cross multiply
    631,909,641.64x = 872,108,963.52 × 367,602,774.70
  4. Step 4: Simplify right side
    631,909,641.64x = 320,589,674,830,693,056
  5. Step 5: Solve for x
    x = 320,589,674,830,693,056/631,909,641.64
  6. Step 6: Final answer
    x = 507,334,678.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.