Home / 1,218,032,599.10-1,680,839,977.64-661,103,688.74

Finding the Fourth Proportional to 1,218,032,599.10, 1,680,839,977.64 and 661,103,688.74

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Solution

The fourth proportional to 1,218,032,599.10, 1,680,839,977.64 and 661,103,688.74 is: 912,298,661.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,032,599.10 : 1,680,839,977.64 = 661,103,688.74 : x
  2. Step 2: Convert to fraction form
    1,218,032,599.10/1,680,839,977.64 = 661,103,688.74/x
  3. Step 3: Cross multiply
    1,218,032,599.10x = 1,680,839,977.64 × 661,103,688.74
  4. Step 4: Simplify right side
    1,218,032,599.10x = 1,111,209,509,387,753,472
  5. Step 5: Solve for x
    x = 1,111,209,509,387,753,472/1,218,032,599.10
  6. Step 6: Final answer
    x = 912,298,661.15

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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.