Home / 1,218,032,615.76-1,680,840,000.62-661,103,705.40

Finding the Fourth Proportional to 1,218,032,615.76, 1,680,840,000.62 and 661,103,705.40

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Solution

The fourth proportional to 1,218,032,615.76, 1,680,840,000.62 and 661,103,705.40 is: 912,298,684.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,032,615.76 : 1,680,840,000.62 = 661,103,705.40 : x
  2. Step 2: Convert to fraction form
    1,218,032,615.76/1,680,840,000.62 = 661,103,705.40/x
  3. Step 3: Cross multiply
    1,218,032,615.76x = 1,680,840,000.62 × 661,103,705.40
  4. Step 4: Simplify right side
    1,218,032,615.76x = 1,111,209,552,594,420,224
  5. Step 5: Solve for x
    x = 1,111,209,552,594,420,224/1,218,032,615.76
  6. Step 6: Final answer
    x = 912,298,684.14

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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.