Home / 716,811.30-989,199.66-390,125.52

Finding the Fourth Proportional to 716,811.30, 989,199.66 and 390,125.52

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Solution

The fourth proportional to 716,811.30, 989,199.66 and 390,125.52 is: 538,373.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,811.30 : 989,199.66 = 390,125.52 : x
  2. Step 2: Convert to fraction form
    716,811.30/989,199.66 = 390,125.52/x
  3. Step 3: Cross multiply
    716,811.30x = 989,199.66 × 390,125.52
  4. Step 4: Simplify right side
    716,811.30x = 385,912,031,741.32
  5. Step 5: Solve for x
    x = 385,912,031,741.32/716,811.30
  6. Step 6: Final answer
    x = 538,373.25

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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.