Home / 938,012,603.40-1,407,018,948.82-642,616,437.96

Finding the Fourth Proportional to 938,012,603.40, 1,407,018,948.82 and 642,616,437.96

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Solution

The fourth proportional to 938,012,603.40, 1,407,018,948.82 and 642,616,437.96 is: 963,924,686.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,012,603.40 : 1,407,018,948.82 = 642,616,437.96 : x
  2. Step 2: Convert to fraction form
    938,012,603.40/1,407,018,948.82 = 642,616,437.96/x
  3. Step 3: Cross multiply
    938,012,603.40x = 1,407,018,948.82 × 642,616,437.96
  4. Step 4: Simplify right side
    938,012,603.40x = 904,173,505,032,931,968
  5. Step 5: Solve for x
    x = 904,173,505,032,931,968/938,012,603.40
  6. Step 6: Final answer
    x = 963,924,686.89

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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.