Home / 1,020,206.80-1,530,484.47-420,840.31

Finding the Fourth Proportional to 1,020,206.80, 1,530,484.47 and 420,840.31

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Solution

The fourth proportional to 1,020,206.80, 1,530,484.47 and 420,840.31 is: 631,332.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020,206.80 : 1,530,484.47 = 420,840.31 : x
  2. Step 2: Convert to fraction form
    1,020,206.80/1,530,484.47 = 420,840.31/x
  3. Step 3: Cross multiply
    1,020,206.80x = 1,530,484.47 × 420,840.31
  4. Step 4: Simplify right side
    1,020,206.80x = 644,089,557,848.43
  5. Step 5: Solve for x
    x = 644,089,557,848.43/1,020,206.80
  6. Step 6: Final answer
    x = 631,332.35

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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.