Home / 385,988,412.81-532,668,123.69-209,776,417.41

Finding the Fourth Proportional to 385,988,412.81, 532,668,123.69 and 209,776,417.41

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Solution

The fourth proportional to 385,988,412.81, 532,668,123.69 and 209,776,417.41 is: 289,493,691.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,988,412.81 : 532,668,123.69 = 209,776,417.41 : x
  2. Step 2: Convert to fraction form
    385,988,412.81/532,668,123.69 = 209,776,417.41/x
  3. Step 3: Cross multiply
    385,988,412.81x = 532,668,123.69 × 209,776,417.41
  4. Step 4: Simplify right side
    385,988,412.81x = 111,741,210,656,194,944
  5. Step 5: Solve for x
    x = 111,741,210,656,194,944/385,988,412.81
  6. Step 6: Final answer
    x = 289,493,691.90

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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.