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Finding the Fourth Proportional to 738,445, 1,019,055.02 and 398,913.25

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Solution

The fourth proportional to 738,445, 1,019,055.02 and 398,913.25 is: 550,500.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,445 : 1,019,055.02 = 398,913.25 : x
  2. Step 2: Convert to fraction form
    738,445/1,019,055.02 = 398,913.25/x
  3. Step 3: Cross multiply
    738,445x = 1,019,055.02 × 398,913.25
  4. Step 4: Simplify right side
    738,445x = 406,514,547,962.45
  5. Step 5: Solve for x
    x = 406,514,547,962.45/738,445
  6. Step 6: Final answer
    x = 550,500.78

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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.