Home / 420,130,811.10-630,196,216.65-213,506,550.30

Finding the Fourth Proportional to 420,130,811.10, 630,196,216.65 and 213,506,550.30

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Solution

The fourth proportional to 420,130,811.10, 630,196,216.65 and 213,506,550.30 is: 320,259,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,130,811.10 : 630,196,216.65 = 213,506,550.30 : x
  2. Step 2: Convert to fraction form
    420,130,811.10/630,196,216.65 = 213,506,550.30/x
  3. Step 3: Cross multiply
    420,130,811.10x = 630,196,216.65 × 213,506,550.30
  4. Step 4: Simplify right side
    420,130,811.10x = 134,551,020,229,052,928
  5. Step 5: Solve for x
    x = 134,551,020,229,052,928/420,130,811.10
  6. Step 6: Final answer
    x = 320,259,825.45

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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.