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Finding the Fourth Proportional to 712,975.77, 983,889.59 and 390,670.29

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Solution

The fourth proportional to 712,975.77, 983,889.59 and 390,670.29 is: 539,115.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,975.77 : 983,889.59 = 390,670.29 : x
  2. Step 2: Convert to fraction form
    712,975.77/983,889.59 = 390,670.29/x
  3. Step 3: Cross multiply
    712,975.77x = 983,889.59 × 390,670.29
  4. Step 4: Simplify right side
    712,975.77x = 384,376,429,499.93
  5. Step 5: Solve for x
    x = 384,376,429,499.93/712,975.77
  6. Step 6: Final answer
    x = 539,115.70

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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.