Home / 660,548,769.40-990,823,154.10-442,870,535.80

Finding the Fourth Proportional to 660,548,769.40, 990,823,154.10 and 442,870,535.80

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Solution

The fourth proportional to 660,548,769.40, 990,823,154.10 and 442,870,535.80 is: 664,305,803.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,548,769.40 : 990,823,154.10 = 442,870,535.80 : x
  2. Step 2: Convert to fraction form
    660,548,769.40/990,823,154.10 = 442,870,535.80/x
  3. Step 3: Cross multiply
    660,548,769.40x = 990,823,154.10 × 442,870,535.80
  4. Step 4: Simplify right side
    660,548,769.40x = 438,806,381,139,312,960
  5. Step 5: Solve for x
    x = 438,806,381,139,312,960/660,548,769.40
  6. Step 6: Final answer
    x = 664,305,803.70

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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.