Home / 719,248,510.78-992,562,912.39-389,223,658.78

Finding the Fourth Proportional to 719,248,510.78, 992,562,912.39 and 389,223,658.78

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Solution

The fourth proportional to 719,248,510.78, 992,562,912.39 and 389,223,658.78 is: 537,128,631.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,248,510.78 : 992,562,912.39 = 389,223,658.78 : x
  2. Step 2: Convert to fraction form
    719,248,510.78/992,562,912.39 = 389,223,658.78/x
  3. Step 3: Cross multiply
    719,248,510.78x = 992,562,912.39 × 389,223,658.78
  4. Step 4: Simplify right side
    719,248,510.78x = 386,328,968,329,768,384
  5. Step 5: Solve for x
    x = 386,328,968,329,768,384/719,248,510.78
  6. Step 6: Final answer
    x = 537,128,631.54

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Double scale
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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.