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Finding the Fourth Proportional to 911,909.35, 1,258,395.72 and 503,990.11

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Solution

The fourth proportional to 911,909.35, 1,258,395.72 and 503,990.11 is: 695,484.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,909.35 : 1,258,395.72 = 503,990.11 : x
  2. Step 2: Convert to fraction form
    911,909.35/1,258,395.72 = 503,990.11/x
  3. Step 3: Cross multiply
    911,909.35x = 1,258,395.72 × 503,990.11
  4. Step 4: Simplify right side
    911,909.35x = 634,218,997,346.33
  5. Step 5: Solve for x
    x = 634,218,997,346.33/911,909.35
  6. Step 6: Final answer
    x = 695,484.70

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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.