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Finding the Fourth Proportional to 738,394, 1,018,984.26 and 398,862.25

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Solution

The fourth proportional to 738,394, 1,018,984.26 and 398,862.25 is: 550,430.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,394 : 1,018,984.26 = 398,862.25 : x
  2. Step 2: Convert to fraction form
    738,394/1,018,984.26 = 398,862.25/x
  3. Step 3: Cross multiply
    738,394x = 1,018,984.26 × 398,862.25
  4. Step 4: Simplify right side
    738,394x = 406,434,354,658.19
  5. Step 5: Solve for x
    x = 406,434,354,658.19/738,394
  6. Step 6: Final answer
    x = 550,430.20

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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.