Home / 1,287,133,046.70-1,930,699,570.05-425,490,038.70

Finding the Fourth Proportional to 1,287,133,046.70, 1,930,699,570.05 and 425,490,038.70

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Solution

The fourth proportional to 1,287,133,046.70, 1,930,699,570.05 and 425,490,038.70 is: 638,235,058.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,133,046.70 : 1,930,699,570.05 = 425,490,038.70 : x
  2. Step 2: Convert to fraction form
    1,287,133,046.70/1,930,699,570.05 = 425,490,038.70/x
  3. Step 3: Cross multiply
    1,287,133,046.70x = 1,930,699,570.05 × 425,490,038.70
  4. Step 4: Simplify right side
    1,287,133,046.70x = 821,493,434,778,647,808
  5. Step 5: Solve for x
    x = 821,493,434,778,647,808/1,287,133,046.70
  6. Step 6: Final answer
    x = 638,235,058.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.