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Finding the Fourth Proportional to 901,369,851.80, 1,243,897,699 and 499,490,313.46

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Solution

The fourth proportional to 901,369,851.80, 1,243,897,699 and 499,490,313.46 is: 689,300,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    901,369,851.80 : 1,243,897,699 = 499,490,313.46 : x
  2. Step 2: Convert to fraction form
    901,369,851.80/1,243,897,699 = 499,490,313.46/x
  3. Step 3: Cross multiply
    901,369,851.80x = 1,243,897,699 × 499,490,313.46
  4. Step 4: Simplify right side
    901,369,851.80x = 621,314,851,585,682,688
  5. Step 5: Solve for x
    x = 621,314,851,585,682,688/901,369,851.80
  6. Step 6: Final answer
    x = 689,300,679.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.