Home / 1,287,133,038.20-1,930,699,557.30-425,490,030.20

Finding the Fourth Proportional to 1,287,133,038.20, 1,930,699,557.30 and 425,490,030.20

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Solution

The fourth proportional to 1,287,133,038.20, 1,930,699,557.30 and 425,490,030.20 is: 638,235,045.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,133,038.20 : 1,930,699,557.30 = 425,490,030.20 : x
  2. Step 2: Convert to fraction form
    1,287,133,038.20/1,930,699,557.30 = 425,490,030.20/x
  3. Step 3: Cross multiply
    1,287,133,038.20x = 1,930,699,557.30 × 425,490,030.20
  4. Step 4: Simplify right side
    1,287,133,038.20x = 821,493,412,942,703,616
  5. Step 5: Solve for x
    x = 821,493,412,942,703,616/1,287,133,038.20
  6. Step 6: Final answer
    x = 638,235,045.30

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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.