Home / 905,390.18-1,249,438.16-497,518.30

Finding the Fourth Proportional to 905,390.18, 1,249,438.16 and 497,518.30

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Solution

The fourth proportional to 905,390.18, 1,249,438.16 and 497,518.30 is: 686,575.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,390.18 : 1,249,438.16 = 497,518.30 : x
  2. Step 2: Convert to fraction form
    905,390.18/1,249,438.16 = 497,518.30/x
  3. Step 3: Cross multiply
    905,390.18x = 1,249,438.16 × 497,518.30
  4. Step 4: Simplify right side
    905,390.18x = 621,618,349,318.33
  5. Step 5: Solve for x
    x = 621,618,349,318.33/905,390.18
  6. Step 6: Final answer
    x = 686,575.10

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Double scale
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Similar ratio
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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.