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Finding the Fourth Proportional to 1,299,877,728.20, 1,793,831,264.95 and 742,972,732.82

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Solution

The fourth proportional to 1,299,877,728.20, 1,793,831,264.95 and 742,972,732.82 is: 1,025,302,371.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,877,728.20 : 1,793,831,264.95 = 742,972,732.82 : x
  2. Step 2: Convert to fraction form
    1,299,877,728.20/1,793,831,264.95 = 742,972,732.82/x
  3. Step 3: Cross multiply
    1,299,877,728.20x = 1,793,831,264.95 × 742,972,732.82
  4. Step 4: Simplify right side
    1,299,877,728.20x = 1,332,767,717,137,859,072
  5. Step 5: Solve for x
    x = 1,332,767,717,137,859,072/1,299,877,728.20
  6. Step 6: Final answer
    x = 1,025,302,371.31

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Double scale
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1.5x scale

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.