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Finding the Fourth Proportional to 656,099.79, 905,417.76 and 369,619.80

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Solution

The fourth proportional to 656,099.79, 905,417.76 and 369,619.80 is: 510,075.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,099.79 : 905,417.76 = 369,619.80 : x
  2. Step 2: Convert to fraction form
    656,099.79/905,417.76 = 369,619.80/x
  3. Step 3: Cross multiply
    656,099.79x = 905,417.76 × 369,619.80
  4. Step 4: Simplify right side
    656,099.79x = 334,660,331,367.65
  5. Step 5: Solve for x
    x = 334,660,331,367.65/656,099.79
  6. Step 6: Final answer
    x = 510,075.35

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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.