Home / 718,560,868.64-991,626,913.04-421,417,426.82

Finding the Fourth Proportional to 718,560,868.64, 991,626,913.04 and 421,417,426.82

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Solution

The fourth proportional to 718,560,868.64, 991,626,913.04 and 421,417,426.82 is: 581,563,622.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,560,868.64 : 991,626,913.04 = 421,417,426.82 : x
  2. Step 2: Convert to fraction form
    718,560,868.64/991,626,913.04 = 421,417,426.82/x
  3. Step 3: Cross multiply
    718,560,868.64x = 991,626,913.04 × 421,417,426.82
  4. Step 4: Simplify right side
    718,560,868.64x = 417,888,862,051,711,488
  5. Step 5: Solve for x
    x = 417,888,862,051,711,488/718,560,868.64
  6. Step 6: Final answer
    x = 581,563,622.92

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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.