Home / 538,302,420.90-742,858,002.05-290,783,775.15

Finding the Fourth Proportional to 538,302,420.90, 742,858,002.05 and 290,783,775.15

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Solution

The fourth proportional to 538,302,420.90, 742,858,002.05 and 290,783,775.15 is: 401,281,966.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,302,420.90 : 742,858,002.05 = 290,783,775.15 : x
  2. Step 2: Convert to fraction form
    538,302,420.90/742,858,002.05 = 290,783,775.15/x
  3. Step 3: Cross multiply
    538,302,420.90x = 742,858,002.05 × 290,783,775.15
  4. Step 4: Simplify right side
    538,302,420.90x = 216,011,054,235,031,488
  5. Step 5: Solve for x
    x = 216,011,054,235,031,488/538,302,420.90
  6. Step 6: Final answer
    x = 401,281,966.88

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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.