Home / 1,398,768,126.69-1,931,171,160.15-890,417,669.72

Finding the Fourth Proportional to 1,398,768,126.69, 1,931,171,160.15 and 890,417,669.72

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Solution

The fourth proportional to 1,398,768,126.69, 1,931,171,160.15 and 890,417,669.72 is: 1,229,330,931.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,768,126.69 : 1,931,171,160.15 = 890,417,669.72 : x
  2. Step 2: Convert to fraction form
    1,398,768,126.69/1,931,171,160.15 = 890,417,669.72/x
  3. Step 3: Cross multiply
    1,398,768,126.69x = 1,931,171,160.15 × 890,417,669.72
  4. Step 4: Simplify right side
    1,398,768,126.69x = 1,719,548,924,241,576,192
  5. Step 5: Solve for x
    x = 1,719,548,924,241,576,192/1,398,768,126.69
  6. Step 6: Final answer
    x = 1,229,330,931.58

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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.