Home / 520,015,971.90-780,023,957.85-213,528,042.30

Finding the Fourth Proportional to 520,015,971.90, 780,023,957.85 and 213,528,042.30

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Solution

The fourth proportional to 520,015,971.90, 780,023,957.85 and 213,528,042.30 is: 320,292,063.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,015,971.90 : 780,023,957.85 = 213,528,042.30 : x
  2. Step 2: Convert to fraction form
    520,015,971.90/780,023,957.85 = 213,528,042.30/x
  3. Step 3: Cross multiply
    520,015,971.90x = 780,023,957.85 × 213,528,042.30
  4. Step 4: Simplify right side
    520,015,971.90x = 166,556,988,666,808,224
  5. Step 5: Solve for x
    x = 166,556,988,666,808,224/520,015,971.90
  6. Step 6: Final answer
    x = 320,292,063.45

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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.