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Finding the Fourth Proportional to 972,928,728.78, 1,461,721,297.95 and 623,858,703.90

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Solution

The fourth proportional to 972,928,728.78, 1,461,721,297.95 and 623,858,703.90 is: 937,280,940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    972,928,728.78 : 1,461,721,297.95 = 623,858,703.90 : x
  2. Step 2: Convert to fraction form
    972,928,728.78/1,461,721,297.95 = 623,858,703.90/x
  3. Step 3: Cross multiply
    972,928,728.78x = 1,461,721,297.95 × 623,858,703.90
  4. Step 4: Simplify right side
    972,928,728.78x = 911,907,554,402,112,768
  5. Step 5: Solve for x
    x = 911,907,554,402,112,768/972,928,728.78
  6. Step 6: Final answer
    x = 937,280,940.96

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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.