Home / 1,398,768,171.84-1,931,171,222.52-890,417,715.12

Finding the Fourth Proportional to 1,398,768,171.84, 1,931,171,222.52 and 890,417,715.12

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Solution

The fourth proportional to 1,398,768,171.84, 1,931,171,222.52 and 890,417,715.12 is: 1,229,330,994.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,768,171.84 : 1,931,171,222.52 = 890,417,715.12 : x
  2. Step 2: Convert to fraction form
    1,398,768,171.84/1,931,171,222.52 = 890,417,715.12/x
  3. Step 3: Cross multiply
    1,398,768,171.84x = 1,931,171,222.52 × 890,417,715.12
  4. Step 4: Simplify right side
    1,398,768,171.84x = 1,719,549,067,461,755,392
  5. Step 5: Solve for x
    x = 1,719,549,067,461,755,392/1,398,768,171.84
  6. Step 6: Final answer
    x = 1,229,330,994.28

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Double scale
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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.