Home / 1,389,962,911.13-1,918,186,275.51-817,785,903.57

Finding the Fourth Proportional to 1,389,962,911.13, 1,918,186,275.51 and 817,785,903.57

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Solution

The fourth proportional to 1,389,962,911.13, 1,918,186,275.51 and 817,785,903.57 is: 1,128,566,585.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,962,911.13 : 1,918,186,275.51 = 817,785,903.57 : x
  2. Step 2: Convert to fraction form
    1,389,962,911.13/1,918,186,275.51 = 817,785,903.57/x
  3. Step 3: Cross multiply
    1,389,962,911.13x = 1,918,186,275.51 × 817,785,903.57
  4. Step 4: Simplify right side
    1,389,962,911.13x = 1,568,665,696,533,518,336
  5. Step 5: Solve for x
    x = 1,568,665,696,533,518,336/1,389,962,911.13
  6. Step 6: Final answer
    x = 1,128,566,585.47

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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.