Home / 915,936,750.86-1,370,438,208.56-542,645,127.50

Finding the Fourth Proportional to 915,936,750.86, 1,370,438,208.56 and 542,645,127.50

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Solution

The fourth proportional to 915,936,750.86, 1,370,438,208.56 and 542,645,127.50 is: 811,913,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,936,750.86 : 1,370,438,208.56 = 542,645,127.50 : x
  2. Step 2: Convert to fraction form
    915,936,750.86/1,370,438,208.56 = 542,645,127.50/x
  3. Step 3: Cross multiply
    915,936,750.86x = 1,370,438,208.56 × 542,645,127.50
  4. Step 4: Simplify right side
    915,936,750.86x = 743,661,616,409,417,216
  5. Step 5: Solve for x
    x = 743,661,616,409,417,216/915,936,750.86
  6. Step 6: Final answer
    x = 811,913,721.90

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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.