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Finding the Fourth Proportional to 807,139,710.80, 1,210,709,566.20 and 738,264,957.20

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Solution

The fourth proportional to 807,139,710.80, 1,210,709,566.20 and 738,264,957.20 is: 1,107,397,435.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,139,710.80 : 1,210,709,566.20 = 738,264,957.20 : x
  2. Step 2: Convert to fraction form
    807,139,710.80/1,210,709,566.20 = 738,264,957.20/x
  3. Step 3: Cross multiply
    807,139,710.80x = 1,210,709,566.20 × 738,264,957.20
  4. Step 4: Simplify right side
    807,139,710.80x = 893,824,446,072,273,664
  5. Step 5: Solve for x
    x = 893,824,446,072,273,664/807,139,710.80
  6. Step 6: Final answer
    x = 1,107,397,435.80

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1.5x scale

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.